I seriously recommend buying one. Actually, I don't; I recommend buying quite a few of 'em!
The V2's are better than V1's in the fact that they have 30 new characters (including some from the Keitai and even some of our old friends from 1996), four brand-new games (the V1 dance and jump are no more, but there's a new jump game on the V2), a Shop for buying stuff, and a Points system!
The V2's are so awesome that I've got two of 'em, but I'm desperately wanting MORE! :furawatchi: