Not for me... but I only run mine once in a great while around the house to irritate the cats. My only issue is overheating the motor because I installed 4 AAA cells which almost doubled the weight of the vehicle. Now it's too much for the motor.
I'm currently looking for a more robust motor and hope it helps. I'll probably change out all the bushings for bearings as well. My biggest problem is cat hair (regardless how much we vacuum) getting wrapped around the axles and causing excessive drag, which is what really seems to be overheating the motor.