I've got two of them, I love it. My only gripes are lack of USB-C and the short battery life on 4k. I would have gotten the ace, but it didn't come in pink.
Windows 8 is ludicrously stable, so everyone should really stop their whining about 8 being junk. It's 7 with a facelift, not "Windows completely redesigned" as Microsoft keeps putting it. Give it one week and you'll be at home using it. To be honest it's more stable than 7 to begin with.