is 8.1 stable? can you revert?

I understand the fact that it's a preview, but I was wondering if it was stable? Like stable enough to use as a daily driver? I figure some of the apps won't work but as long as I can use the system it'll be fine. So as of those who have been using it, does it seem stable enough.

If it's not stable or anything, how hard is it to revert without doing a full reset.