I currently run a Losi Type R touring car which is very stiff and doesn't seem to be the worse for it. Watching the car go around the track it looks largely the same as other cars. If there is one handling characteristic I would pin on the extremely hard chassis, it would be that the car has a much harder low-speed rotation than most cars where the car pivots right on the nose. This can be adjusted, of course, and I do tend to run a little more front sauce than most TC racers for a given traction level, but I like the car and would not consider the stiff chassis a handicap.