My opinion so don't flame me

Lets face it. Manufacturers need to make money and they will not put the good stuff and sell at a loss. If you want to enjoy the hobby, stay away from RTR. RTR components (radio and engine) are their cheapest and you'll end up spending more money to get your car running the way it should be which might include buying a new/different engine and better radio.

If you add a few more hard earned dollar and buy a kit, choose your engine and radio, I believe you will be happier in the long run. To me, this is the way to enjoy the hobby.