I'm not an Apple diehard and I've been using Windows all my life and OS X for less than a month. I got a 13 rMBP for Christmas though, and after a few weeks I find myself using my rMBP more than my Windows machines for a few reasons. Most of it comes down to killer hardware/software optimization - you can just tell they were made for each other. Here are a few things I really love about using a Mac over a Windows PC. No driver updates. Upgrading to Mavericks was simple and easy. Upgrading from Windows 7 to 8 and then 8.1 (especially on laptop hardware) is much more difficult sometimes in my experience. I have a high-end late 2012 Windows laptop that can't upgrade to Windows 8.1 because of display driver issues - although I didn't know that, so after attempting to upgrade (and booting to a black screen - even in safe mode, which makes no sense) I had to use a recovery partition to restore it. There were driver issues with Windows 8 that weren't resolved as well. Software. Windows has a huge library of software, everybody knows that. OS X has a pretty active software development community and some nice exclusive apps that I haven't really fully looked into yet. What I have seen is the default software - including Pages, Keynote, Garageband, and iPhoto, all of which are well-made, well-integrated, and very functional and efficient. Exporting files to Windows compatible formats is a cinch - I even stopped checking them before submitting them after the first few. Trackpad. Before I got a Mac I treated trackpads as a necessary evil. When I used a laptop I used a USB mouse as well. The Mac trackpad has completely changed that - I do things more efficiently with the trackpad than I did with a mouse. I'd heard people say that before and thought they were exaggerating but you really have to try it yourself for a few days to really get it. Keyboard. I've typed on ThinkPads and EliteBooks before and to be honest the typing is just as good on them as it is on the rMBP (and on any of them, it's heads and tails better than most laptops). That's not all there is to the keyboard, though - the mission control and launchpad hotkeys are very convenient once you know how to use them. And speaking of mission control - I love it. Its quick and seamless, and it doesnt pause anything youve got running. I dont understand how it seems to work without slowing the programs that are running, but I love it. If you tend to have 30 different things running at once (as I do) its especially awesome. Dock. It's just nicer than the start menu (or that Metro nonsense). I like being able to store folders on it and have easy access to stuff that I use often, like the downloads folder. (near) Universal drag and drop. This is one of the great examples of "it just works" (when it works - which is almost always). It's nice to be able to drag and drop things between different apps. Spotlight. It works like Windows' search function - Plus it indexes your email and searches through that as well. All instantaneously (thanks to the SSD). Memory compression. My rMBP has 8GB of RAM, which is plenty for most usage on OS X or Windows for that matter. OS X has a nice little trick with memory management, though - is compresses memory for applications you're running in the background instead of defaulting to a swap file, which makes for far superior RAM usage in many circumstances. Running side by side with a Windows laptop, I find I'm able to have a lot more stuff running in the background without any performance hit on OS X. Now, this wouldn't extend over to single application memory hogs - but for people who just like to have dozens of tabs open and dozens of other applications, it's much easier on OS X. Pages and Keynote are great. I know I already mentioned that under software, but they're just so much simpler and cleaner than Word or PowerPoint. Numbers doesn't work for me, so I still have Excel, but I greatly prefer working in Pages over Word or Keynote over PowerPoint. iTunes doesn't suck. I've been using iTunes for years on Windows and it's always been a behemoth of a laggy memory hog. I don't know exactly why, but it just runs so much better on OS X - well enough that it's actually a plus, and feels like nice, optimized software. iTunes is a necessary evil on Windows, but a great program on OS X. Activity Monitor is nicer than Task Manager. I love the energy monitor. Steam works well, and there are a lot more OS X games than youd expect. Even triple A titles - XCOM: Enemy Unknown is a current favorite. Universal menus. You dont know that you want these until you have them. Whatever app youre running, the menu bar for it is standard and in the same place. Its pretty fantastic. Notifications, available on the right. There when you want them, gone when you dont. iMessage and FaceTime. I rely on them a lot on my iPad/iPhone - if you dont use one of those or have friends/family that do I can imagine they wouldnt be as useful. The Mac App Store. Its just like the iOS app store, enough said. I wish more app designers used it. There are a few points where OS X and Windows are pretty tied up, or just weird things that I prefer on Windows. Command is Control, except when it isnt. You need to relearn some hotkeys - CTRL + C doesnt copy, COMMAND + C does, etcetera. Screen resolution is problematic. Theres no default way to run at a glorious 2560x1600. Luckily there are third party apps that fix that quickly and free. SwitchResX is what I use, and even though its available for free I paid to register it because it works very well. At 2560x1600, with mission control, my rMBP turns into an efficiency powerhouse - I just wish it was available by default. ENTER doesnt start applications, it - renames them? This is just weird and a bit annoying at first. The filesystem is hidden. View -> Show Path Bar, pretty much fixes that. It took me a little while to figure that out but now its just as easy to access the filesystem as on Windows. And then there are a few things I miss from Windows. Aerosnap. If you use Windows 7 you might not even know what that is - its the thing that makes it so when you drag a window all the way to the left it automatically fills half the screen on the left. An app called Cinch fixes that, but it doesnt work for a few applications (Steam included). Gaming. You cant play as many games on OS X as you can on Windows. That seems to be changing, but for now thats just how it is. If youre into gaming, youll need a Windows machine or Boot Camp. On a more hardware-specific note, theres a lot to love about the 13 rMBP. Its tiny and super-portable. Its solid. No creaks here, though Ive heard some people have trouble with them. The keyboard and trackpad work very well with the software, as I noted. The MagSafe charger is great and wont knock down your laptop by accident. The battery life is fantastic. Ive gotten almost 9 hours of use between charges (although I dont tend to do many battery-intensive things in most of my usage) It doesnt get hot. It gets pretty warm on the inside but the outside is never more than slightly warm. The screen is fantastic - my other main machine has a 17 1080p TN screen which is very nice looking, though the viewing angles leave a bit to be desired. The rMBP screen is so much sharper and offers so much more space, though, which is just awesome for me because instead of just laying two documents side by side I can have three or even four open. The maximum brightness is roughly equivalent to a roadside flare being shoved six inches in front of your face, but right around 50% looks great. Intel Iris works great for most games at 1280x800, which is fine on a 13 inch screen. Similarly, although the CPU is a bit of a step down from the high end i7 I use on my Windows laptop I dont notice a difference in performance in most of what I do. The only thing I dislike about the hardware is that there are only two USB 3 ports on it. Normally I need three, for two hard drives and a mouse, but I dont use a mouse with the rMBP because the track pad works - so Im looking into getting a nice powered USB 3.0 hub just in case. So overall, Im loving the rMBP. For my purposes - mostly web browsing, multimedia, and referencing absurd amounts of PDFs and text documents, its fantastic, and makes me think I should have tried switching over to a Mac a long time ago.