Hmm. If the release date is July 29, that's not so far away!
The kinds of bugs people are reporting above bother me, because they feel so "simple". Last I knew the "mood", Win 7 was solid, Win 8 was taken over by the Interface discussions, so I was hoping by now the backbone of the OS is supposed to be really polished!
I'm especially keeping an eye that the 8.x updates were far from smooth! Summarizing my big posts elsewhere, I'm keeping an eye on Win10 for its "place in the timeline". But I'll have to decide what their timetable is, and whether if whatever they would call 10.1 with their rolling updates contains any bugfixes that sound really important.