I would be happier if the apps for it worked, like the store one, for example. Problems started when I tried to install Visual Studio like a month ago. It was a mess, having to do System Restore like 5 times since the program wouldn't open properly after the installations, not to mention the proper packets that I wanted didn't install at all. After completely deleting it from my computer, some Windows propietary apps wouldn't open. They are greyed out with the exclamation mark on the lower right corner, giving me an error message that I need to access the store. Maps, news, pictures... even the Store can't open.
Apart from that, I've gotten used to it. It's much faster to boot and load than Windows 7, which I really liked. If it wasn't due to the app annoyance, it would be perfect for me.
My biggest problem was the store. For some reason, on my PC, the store froze and nothing would update. Took me hours to find a way to fix it. After that, it's been a beautiful thing. I actually uninstalled Windows 7 once and for all. There's no going back but I don't think I'll regret it.
I'm not the most PC savvy guy but I can usually make them do what I wqnt them to do. Ask Cortana for a fix. That's all I can say.