Long time paying customer, use it for doctoral research, etc.
I was a beta tester, and was shocked to find it released into the wild the way it was. For me, it's missing some key features, like tabs. I do really miss the ability to set my own fonts; when I asked about this, they said it was to address a problem when sharing notes with people. Well, I don't know how many people share notes. I suppose if it's a corporate or team account, sure. But to *assume* that everyone is working on a team and redesign to that loses you all the non-team users. I don't share notes with anyone but me and my wife, and it's rare. Dropbox did something similar, where they assume every user is corporate by default. Mac users can no longer "lock" their documents stored in Dropbox, because that would interfere with sharing and group document work.
That said, I have noticed some improvements. I have notes with lots of archival scans of documents, and those seem to be significantly more responsive in some ways now. Probably the result of the rebuilt code base?
But for the short term, at least, I'm sticking with 7 on OSX, and hoping that these other missing features get added as quickly as possible.