The pressure assist ones are nice and they do get the job done. The best one's I've seen were at the Disney Hotels in Florida. However nothing beats an old 1940's-50 toilet for getting the job done and just to total effect. I have a 40'-50's toilet and the tank broke. I glued and wired it back together!

The hell with a new one!

The pressure assist ones sound like a jet taking off and they can even splash stuff out if turned up too high.