I played warrio ware yesterday, I like it a lot but i beat single player in like 2-3 hrs, but I may still have a few tings to unlock, I have yet to try multiplayer on it.
In the game it is fast paced and you have to put the wiimote in certain positions and use it in a certain way depending on what mini game pops up, for example holding the wiimote like a samurai sword at you hip them drawing it fast and slicing a barrel, overall it is just an fun goofy game
id say just rent it, unless multiplayer has some addictive modes, I have only unlocked 1 of the muliplayer games.