Just got mine and setting it up. First three attempts to configure at boot time resulted in spinning beach ball at different parts of the setup. Worked on the fourth attempt. Keyboard backlighting is very uneven vs the marketing - regular keys are fine but the delete, return, shift, etc have a noticeable variation in backlight intensity. Very disappointing. Keyboard itself is a joy to type on. Sounds and feels nice and tight and precise. Played 4k from Youtube no issues while concurrently running a bunch of different apps, safari tabs and downloading updates. Got a little warm but nothing I would call hot or uncomfortable. The three finger drag seems to be gone in favor of one finger click and drag but that might just be a config issue in prefs. Final Cut X works, albeit a bit of a stutter now and again when hover editing, etc but very useable if you only do occasional work in it. Currently have a bunch of apps open and am using the Office Mac preview version of Word with a bunch of Loris Ipsum pages (40-ish) and the machine is cool to the touch. Superb machine I will keep but I want to check out the in store demo units to see if my backlighting is normal. It's nowhere near as impressive as the marketing would imply. I have the 1.2 / 512 version. Hope this helps anyone on the fence. For what I need, it is perfect.