Agitation and ultrasonic waves were great in the middle, but weak/weaker near the sides. I believe this only has one transducer and that's the reason. Capacity is somewhat smaller than advertised, but measurements are good. Go by those. The bigger issue is the heater. Got the water from 30C to 48C in reasonable time, but struggled and took forever in the 50s. I didn't let it run long enough to get above 58C, but if it can hit the \"max\" I think it'd take hours. Overall, worth $50, but improvements could certainly be made