I'm ashamed to admit I own it...
Graphics- 1/10- dire. The still image of the person you're taking to their destination is better than the game graphics. I've seen better graphics on Atari.
Gameplay-2/10 it is awful. It is just awful. It's like a very downgraded version of Crazy Taxi.
Sound-2/10- Awful tune and bad sound effects.
Value-1/10- It's so boring you will switch it off after one round. There is a lot of characters to unlock, but you'll never get them.
Really, if you MUST play it, then buy the home console version, which is a lot better, but still quite bad. Or avoid This game in every way and buy the better Crazy Taxi on a home console