Time to re-evaluate this title, the £5 pricepoint it's currently at is now in Wii-ware territory. If this came out as wiiware for 1000 points it'd be the buzz de jour. Its had a harsh ride judged alongside Rockband and Guitar Hero, but it's not trying to be that all encompassing music game.
What it is, is a pick up an play pile of fun, nothing more than two wiimotes and a willing accomplice, a few beers maybe, and you too could be enjoying hearing blitzkrieg bop played by a hillbilly outfit, or be serenaded by a mariachi band playing Insane in the Brain (while launching devious attacks on your opponents riffs)
The music choices are wideranging and quite good, only one or two plodders. Hearing them arranged in alternate styles is a joy. It could do with more polish, and clearer graphics, but does have a solid gameplay core, surely worth a punt as an non off-putting entry into rhythm games. Its a great laugh.