Well, probably 6 or so hours of play, granted I wasn\'t set on playing all the levels, I could have done it faster. The repleay value is excellent. Especially when you get good, and don\'t mess up, the songs sound great, and you want to hear them again and again. I haven\'t beat a single level in Master mode yet, must. . . play. . . more!
I can\'t say enough good things about this game. Definately a party game, only takes about 30 min. to get good enough for a good volley in 4-player competition, so new peeps can have fun right at the start.
I love Parappa, but I love Gitaroo 10 fold!