I just did about 24 hours with mine.
Browsing IS solid. I was really expecting something less than adequate. It certainly is on per with my daughter's iPad 1. It really is smooth and very fast.
Apps- definitely not as good as what I get on my phone....I do miss my DVR app, my Google+ and such- I hope they will be coming at some point but otherwise, Taptalk, Netflix, twitter and all are just fine.
Reading- oh yeah I still prefer my Nook (or Kindle if you have it) e-ink is still far superior for long term reading- but that said, comics and magazines do look great on this thing. I grabbed for free, the first edition of Walking Dead- a page does fit nicely on the screen- it is a bit small for reading without zooming but again, no complaints.
I set up my gmail- took minutes, have not done my other email but I don't anticipate any issues. My first turn on had the thing registered in seconds and I went right to the upgrade/dl system. Installed fine - but that does mean that I can't compare a before and after.
The speakers are a bit quite- if I cup my hand by them it helps - or of course, headphones.
Power button- for me it is not so much the placement but the ease of hitting it. I did turn it off a couple of times accidentally - a recessed button would have been much better.
UI- I am not totally taken in by it- I do like the menu on the top-I can quickly go to books, apps, web or whatever. The shelves on the main front UI are ...eh. Maybe I will grow into liking it more but for now it is just soso.
So like Huz...for 199.00 you get a great tablet. Now I can sit and update facebook, read QT3, tweet, read the news in the morning over coffee and buy lots of shit. It is worth it. I have absolutely no regrets at all and I was a bit leery but now I am really happy that I have a tablet.