I Put one on my Cedar Creek 33 ft 5er. I did a lot of research on the several pin boxes on the market before deciding. I am an engineer and talked to the engineers at several of the companies. The 5th airborne engineer convinced me. This is the one. You do have to make sure the air pressure is correct every time you hook up. A small battery powered compressor works well. You just air it up to a line on the shock adsorber. If you don't it doesen't work. If you do you will be amazed at the ride improvement. Installation is easy with some large wrenches. Have fun and happy towing.
Mike in Florida