I started looking online for Wii Mario Party and decided I just couldn't afford it. My sister has brought her's over quite a few times and we love to play it. Upon reading reviews and investigation Tamagotchi Party we decided to go that route. For the price and all things considered, its awesome. The kids love it, I guess I kinda enjoy it too.
A few drawbacks, you don't all do the minigames together. All minigames are one player, and you don't do any after everyone's turn, you have to land on the space. The sound is a little annoying, we usually just turn on the stereo and mute it. There is no way to play with less than four players on the board. The computer can play but you always must have four players, so if you want to play by yourself it's slow.
Like I said, if you are on a budget and like mario party, try it. It's pretty close as far as gameplay.