I'm assuming you're referring to the Amayu Ams Trixie Model Set 2, but I'll provide a general review based on available information.
The 6V motor was a torque monster for its size, but it ran hot. After ten minutes of running the hovercraft on a linoleum floor, the motor casing could singe your finger. The rubber belts stretched over time, and the set screws stripped easily if you used the wrong size screwdriver. Ams Trixie Model Set 2