The Wii Fit is an excellent invention and is really good fun, if you are new to exercise then this game will really help you, games in the arerobic section such as the super hula hoop and the boxing are the calorie burning games and really do work, the step is quite fun, particuarly when you unlock the super step and if you are relatively new to exercise then this game will have an effect but bear in mind the step is fairly low so any serious stepper is unlikely to be impressed, The muscle games are also really effective and some are really quite difficult particuarly if you have to try and balance too.
There is a section of balance games which give the fun factor, these are the games we play as a family to have a laugh, i personally don't feel they aid your fitness but they are addictive!!
Every minute you spend playing the games is saved up and gradually as your time increases you will unlock new games, the only down side to this is you unlock all the games really quickly so if you get bored easily this wouldn't be particuarly adequate. you can also unlock extra skill levels on certain games to make the games you have got used to slightly more difficult.
The yoga section is very good although you have to play each pose seperately which can be annoying.
Overall it is really good fun and if you buy it without any expectations then you should be pleasantly surprised, it is also a really good way of spending time with family and friends but doing some exercise at the same time, the laughter you get with it should also burn a few calories!!! I have also bought the game 'My fitness coach' and if you are looking for a real fitness programme that will really get you moving and burning calories then that game would probably be more suitable.