I upgraded last night, and downgraded to 6 this afternoon. Aside from not liking the new look, I have issues with the Google/Microsoft "flat" look-it's harder for my brain to process what I'm seeing for some reason. Programs have been slower to open because they've added short animations when the program is launched, and the touch screen seemed less responsive, whether this is because of something with the software, or because they shrank the "touch" areas for some of the icons, I don't know, but I definetly had a harder time closing tabs in Safari after the upgrade due to the smaller close button on the individual tabs. Also, if they're going to change how you close programs (which is VERY important for a program at my workplace) they should have included a tutorial in the new OS on any major changes like that. Someone told me that they ripped off Android there, but if you've never used Android, how would you know, and why would you assume that's how it now works on Apple's competing products?*
*Important to me, as I am the unpaid tech-guy at my workplace, and people struggle with basic computer/device literacy as it is.