Crazy Taxi is pretty great. It features 2 rather big cities, a pretty awesome soundtrack by The Offspring and Bad Religion, tight control, and pretty good graphics. Oh, and smashing past everything like a maniac while trying to make it to stops on time feels awesome.
The good: * big levels, even though there are only 2 * extremely pick-up-and-play * nice graphics for a 2000 release * the product placement is silly to see, driving to KFC and Levi's brings some life to the game
The bad: * no multiplayer * soundtrack does get a bit grating after hearing it too long * has some annoying pop in issues at times, especially with destination markers * the product placement is a bit excessive
Overall, it's a rather good game, with very little to complain about. As for difficulty, it's not hard to pick up customers and get them places, but it is hard to get a good score, which is pretty much the entire point of the game. Get in, get cash, and get out. It's Crazy Taxi!