The graphics aren't that bad, and the sound can become very annoying and repetitive. The community can suck horribly, and it can be very good. A lot of the members of blockland are young children, so you can't expect everybody to be sharp. You can find quite a few intelligent people on the game, so don't worry. There are bugs and glitches, but not enough to be a pain in the ass, and you can host your own server without port-forwarding. If you like legos, you probably will like this game.
If you don't like children, you should not buy this. But if you like legos, and can deal with some snot nosed brats, buy this game. That's pretty much it.