In my own personal experience, I'd stay away from any starterbox like the JLR (has a small platform in order to turn on the motors). The best starterbox, speaking of design, is the ones that you push down an entire platform in order to turn on the motors. I say this because if your car flames out during a race, it is easier to place a car on an entire platform rather than a small platform for the rear of the car. With this in mind, I'd suggest starterboxes like Mugen type.
eBay user id: riketsukirai
Selling all my MTX4 parts, bodies, radio and everything!