I’m sure there have been countless threads like this before, so my apologies. Just wanted to share some impressions I've had of my new machine. About a month ago I purchased a new mid-2015 15" rMBP, topped out with the 2.8Ghz i7 CPU, dGPU and 1TB storage. I got a pretty decent deal on it (for me anyways), so I figured why not since I didn't feel the need to wait for the rumored 2016 MBP refresh and I was coming from a base late-2011 15" cMBP (also with dGPU). Aside from the significant increase in resolution of the retina screen, and being thinner and lighter, I haven't been too "wow-ed" by the overall package, and I think it really comes down to the experience of El Capitan more than the machine itself. Aside from compute heavy tasks such as rendering audio and video that I sometimes do, the day-to-day tasks of using the machine don't seem much faster or fluid than my 2011 cMBP that's currently running Mavericks. In fact, I feel as though El Capitan is a bit laggy and stutters when doing things like switching windows, moving between desktop spaces, opening tabs and whatnot within Safari or Office applications. I'm a bit surprised by this because I figured that these sorts of things would fly on the top spec'd machine I got. And it's a brand new machine that still doesn't have too many of my applications on it yet. I also feel as though this might be attributed to El Capitan because aside from my cMBP that has Mavericks, I also have another Mac machine with comparable hardware and 16GB RAM with Mountain Lion that is smooth as butter...literally no lag and stutter whatsoever. Also I don't know if it's just me or my tired eyes, but sometimes the screen on the new rMBP feels washed out. Maybe it's just the new visual theme of El Capitan/Yosemite compared to Mavericks? Or maybe how El Cap now handles brightness? I read in a couple of places that El Capitan changed the way the auto brightness works and that it now also adjusts the gamma when adjusting how bright the screen is. And also the keyboard...I realize that they key travel will be different compared to my cMBP because of the thinner form factor, but I've noticed that some keys are mushier than others, particularly the top rows. Not a huge deal, but I liked the consistency better on my older cMBP. Have others had similar experiences with their rMBP's?