We’ve had an Airhead in our workshop for about five years and it works perfectly for us! I agree with the benefits that others have mentioned in other reviews: The bottle removal does not require opening the entire unit. Also that the unit has a real seat with rubber seals. But, what I haven’t seen mentioned is the little details such as the captive screws that stay in the toilet housing when a particular component is removed or the fan design that allows flexibility to mount anywhere in the hose run. All of these details combined create a great product!