Fun and Interesting plus different from any other games out there.
The worlds are large and there are lots of people, but at times it can be way to easy and and other times its just way to hard. It also gets fairly repetative after just a few times of playing.
There is a neat car creator where you can make your own car with any lego pieces you want, plus the different islands make for different worlds to play on.
It is a good one to pick up from a bargain bin and play around with though.