I have 2 quad cells right now. The thing is wheelie crazy if you don't weight the front down. Both my of my quad cells have higher tooth pinion gears on the orange motor to gear it faster. This helps with the wheelies. They are also prone to role every time you try to turn at higher speeds. I tri-celled my younger brothers, and with orange gears, it's a lot more manageable. It all depends on what you're going for.