This game has a steep initial learning curve, which takes maybe up to 30 mins to get to decent grips with! my first few goes were no fun and the training was initially very hard.
Compared to wii sports tennis etc.., this is not really suited for a mates after the pub or entertaining visitors, unless they are spent the time learning the controls as it'll be no fun. (A bit like a non tekken-3 owner attempting to play someone who owns it and regularly plays it - i.e. you'll lose. A lot).
But once you get the hang of it its really quite good. Although I found that changing a few of the default settings made for a preferable experience (change camera further back, make player transparent to allow the ball to be visible all the time, take off automatic full focus power thingy, turn off background music and lower the crowd volume etc...)
I'd recommend playing in the easy control mode first (no nunchuck) for a while and then graduating up to two handed.
Its true though that it doesn't seem to have a left handed option, which I can imagine makes it a poor choice for left handers.