There have been issues with the Genesis that Cen is having a "Care Package" Going out to all those who bought the first run of trucks. Some of what I have heard:

1. Engines breaking with stuff inside them
2. No breakin instructions
3. Parts not fitting right
4. Can't get it to shift into 3rd

From what I have heard, alot of the people who have had problems don't even get past the breakin point. I think there is a good discussion on this at rcuniverse .

Personally, I think you may be happier just going with a LST or some other monster.