I love it.
Now, there's a lot of parts in this. The good part is that you'll have a lot of customization options. You build a lightweight, a 4 leg, a tank, or other things, each with their own pros and cons. Also, it takes a while to get every part, and hard to find a lot of them too. So you can keep busy with it for a long time. I grew up with this game, and love it.