For starters, I'd definitely go with the aluminum kit. The carbon kit is good, but the aluminum feels better on the carpet. It also adds weight to the car at the very lowest point, so that's a benefit. I've hit a few things, rather hard, and I have yet to break anything. If we carry the cars at the shop, I'll definitely make sure to keep the spares in stock as well. But from what I've seen so far, it can take a beating. Not saying you won't break anything, but it can hold its own.