It doesn't suck. It's as fast as it needs to be with a 1.3-ish gear reduction between two L motors and the rear two wheels. Speaking of, each axle is driven independently by each motor and has only a single gear pair between the motor and the axle for maximum drivetrain efficiency. Between the front wheels and rear wheels is a modular articulated steering setup. The steering motor is an M motor that goes through two bevel gear sets, one of them a 1.3-ish gear up to increase RPM, before going into a small linear actuator that pushes the front end back and forth. The front end is literally just a battery box and wheels attached to the front end of the articulation pivot. Atop the steering motor is an infrared receiver surrounded by sunshields, only allowing a small slot at front and rear for receiving a signal. This is mostly sufficient, and it cuts down significantly on interference from sunlight.
The truck performs fairly well, but definitely needs improvements. It goes fast enough on the road, although large bumps can cause it to stop, as the small front wheels are a liability. I would like to have larger wheels, but the only large wheels I have were fashioned from Lego large track sprockets, rubber treads, and small treads. These have worked well so far, but I only have 4 of them, which is a problem for larger vehicles. It also is capable of going off-road, but can easily get stuck. And finally, the most serious problem is an inability to drive in any type of grass. I have made an RC pickup truck that was larger than this, and it was very cool indeed with a 4-speed manual transmission, a transfer case to shift between RWD and 4WD, and rear suspension. However, the problem with the complex drivetrain is that it lost a lot of power, resulting in poor off-road capability even in first gear and 4WD. I've made a few other RC cars, but those were all ones designed for speed, not off-road capability, and they worked well until the motors got hot and lost power. I made a few tanks, too, and they were up to the task and very fun to drive, but in the end I took them apart. I tried to make a halftrack, but that didn't end well either. I did make a wheeled front loader, which did very well, but I wanted it to be bigger and more capable, hence this thing. My next construct might be a large bucket wheel excavator, which will certainly be a blast to build, but driving it...it might be slow.