I got mine on Sunday, release day. So far I love it. The 8" is the perfect size for me. I have only played with it for a couple of hours each day, but everything works good so far as I can tell. I haven't tried the bluetooth or miracast features yet. I did have a couple issues with the a couple of the pre-installed apps not keeping my settings and force closing such as Smart Remote, but after resetting it a few times it seems to be stable now. Overall the weight and size is perfect for portability and one hand operation. I definitely will get a case for it, though. It's thinness feels awkward to me when holding with one hand for any length of time.
Edit: One feature I thought I would point out is that Samsung included the ability to move apps to SD.