Dapol – the English builder – did not agree so I built in a decoder and experienced all the faults Atlas mentioned.
To get along with it I removed the circuit board and installed the decoder like I would had it been a locomotive.
The car works nice; its ability to vacuum clean is good. To polish the track, it has some effect but I miss another brand to compare.
I did precautions must be taken not to overheat the motor.