Good news and bad news. First the bad. It forces updates on you for all software, hardware and features in your system. Your only choices are to let the computer restart automatically 'FAST RING' or install updates later and restart manually 'SLOW RING'. This means if you have a GT120 in your system alongside a new Maxwell card, Windows 10 will force install a driver for the older card that is incompatible with the new card. Your nice expensive new card will be disabled. You cannot prevent this even if you disable the old card in Device Manager. So you can't have both cards in your system. To be balanced this is Nvidia's fault for creating an incompatibility in their driver set. Apple Keyboard Numeric Keypad doesn't fully work in Calculator. You have to hit the key above 7 to activate the pad. Photos app. You can't use it unless you sign in with an account. Some Chrome Extensions or any app that searches for OS version may not work. The cMP doesn't have a mic-in so you can't use Cortana unless you buy a USB mic. Now the good stuff. It boots in 9 seconds on SATA2. That's faster than OSX boots on SATA3. It's smoother faster interface than Windows 8.1. The Edge Browser that I am posting this from is fast but is lacking in some essential options. I can't change the default search to Google yet. Boot Camp support already exists with the 8.1 drivers. They are completely compatible. Native USB 3.1 support from Microsoft if you have a card. Solitaire is back. Your mom won't be calling you much. A really good weather and news app. Quiet. I hear the cMP fan less than before. The Taskbar. Loving it. Dare I say it is better than the Dock. App Switcher. Wow. It's just so fast and smooth. Split View. Silky and easy to activate on a low GT120. It doesn't create a new virtual desktop when you do it so it's quicker to activate and deactivate than El Cap's version. Games run smoother and drop less frames. This is the first time Microsoft has created a genuine replacement to OSX. They have taken the best from the last 20 years and removed much of the terrible stuff. This automatic driver updates is my big gripe with it as I now have to remove the GT120 from the system to make my GTX980 work.