I bought this just under a week ago and its not only a great game, but its considerably more impressive than I expected it to be. In fact, I personally prefer it to the Grand Theft Auto games.
One of many things that impressed me about this game is that it was genuinely funny. Loads of satire, some it obvious, some of it subtle.
I liked some of the mini-games which I got the impression were tributes to older games. I mean, there's a lawn-mower simulator (there was one of those on the old Commodore Amiga's) and there's also a mini-game where you make money as a paper boy. It reminded me of, you guessed it, the old Paper Boy game!
Some of the characters were good too. I liked the homless guy behind the bus who saw active service during the Korean civil war. Some stinging satire towards the military early on there that made me chuckle.
Not a perfect game but it'll definetely stay in the memory long after the hardware is used on has become obsolete.