This little gizmo has made cleaning my tenor (alto) horn a breeze. Seriously you attach it to your shower hose, after removing the rose, and add some detergent to the mouth piece receiver give it a good flush through a couple of times and then attack the valves and tuning slides in a sink/bucket.
The only down side is Id like to see a thin layer of silicone around the nozzle port, just to protect your instrument a little more.