Personally I wouldn't stick to stock, not because stock is unusable, but because it lacks access to the Android Market. My understanding is that TnTLite operates very similarly to stock, but it supports the Market and is more stable, etc. I personally was not terribly fond of the stock UI so I went with VEGAN (after a couple of ill-advised attempts to install gTablet-compatible CyanogenMod - I should have investigated VEGAN first.)
With that installed I am fairly happy with my purchase. The viewing angles of the screen are indeed bad, and it doesn't seem quite fast enough to play my 720P video files, contrary to the advertisement (possibly it would be able to if they were in a different format, but the format I have is the format all the HD video content I've run across is in). Also, Android development seems to be heavily phone oriented right now. Do not expect a significant number of tablet-specific or adapted apps just yet. But otherwise it's done very well at the things I've wanted from it. Pandora, browsing, email, streaming videos, reading comics, and viewing onboard (nonHD) video all work beautifully.
Some app recommendations:
Thumb Keyboard - it's a paid app, but it's only $2 and it has substantial customizability. The basic idea is to replace the default Android keyboards, which directly mimic a hardware keyboard layout, with layouts that split for optimal two thumb typing. This is particularly nice on a gTablet due to the substantial width of the landscape orientation. (And it has a 10" tablet layout.) The split areas of the keyboard go conveniently to the corners, and the middle has less used characters like symbols and numbers.
PlayOn: this one's a bit spendy and requires a home PC with a decent internet connection, but the result is the ability to play content from Hulu, Netflix, Amazon VOD, various network TV sites, and a variety of other streaming media, not to mention a beta feature that will stream local media from your PC (though you have no ability to skip around in it, just play and pause.)
PerfectViewer: This is a free comic viewer app that is, as it says, pretty well perfect. I wish it had the ability to display two pages side by side, but I assume that that wouldn't be very useful on the 3 or 4 inch screen of a phone and it probably hasn't had tablet use taken into account (yet?) in its design. Otherwise, excellent.