Hard to say if YOU should buy it...
I have no regrets but I can see myself going for a higher res tablet once those come out (the currently announced honeycomb tablets).
The screen is the only real disadvantage of this tablet, regarding viewing angles and perhaps resolution. (About android, android 2.2 is ok for tablets... not the best but works just fine. Really hope honeycomb will become available though.)
But for regular browsing, watching videos, listening to some music, checking some email, playing the occasional game (I'm not a gamer though) it's just fine and imo certainly worth the money.