This is a great game and I have to say I don't agree with the first review on here at all. As a fan of the first game the reviewer is of course entitled to their opinion as they have knowledge of what Boom Blox is all about.
I think this is a great alternative to the first game and like the other review says there I times I prefer the first title but also times when I prefer the sequel. If you are a fan of Boom Blox then buy this game. If you haven't played the original then pick that up or the sequel as soon as possible as the series really is one of the Wii's greatest.
Graphics and game engine have been improved from the first game with less slow down and a better look overall. The same addictive gameplay is there in single player mode. Accessible for casual players but hard enough for those that strive to get gold medals throughout the experience. Multi player is as fantastic and robust as it ever was. Add to this that the sequel has more levels from the off and then take into account that an infinite amount of them can be downloaded FREE from online just makes the whole package amazing value for money.
I would overall say that Boom Blox: Bash Party is the superior game to the original but being a huge fan of both titles I have to say both games offer enough content to warrant a place in your Wii collection.
For fans it is a must have and for new comers I strongly suggest you get yourself familiar with the Boom Blox games ASAP. Great addictive gameplay, good use of the Wii remote and one of the best physics based puzzle games I have ever played.