Installed on a 04 Nissan Titan, and the change in ride quality was drastic. Much much better ride with these set at 50 PSI. Did raise the back of the truck a few inches, but worth it. Have not towed with these in place yet, but initial thoughts are that these are going to make a world of diffrence.
Time will tell
Installation was fairly straight forward for my Toyota 4Runner, and the bags should help when carrying heavy loads. I read one review that complained about the air line T being too big for the tubing and couldn't agree more. Like that guy, I tried lubrication and heat to assist, but could only manage to get the tubing just over halfway on the barbed T. Come on guys, spend a dollar and include a brass T that fits. The other barbed fittings (on the bags and schrader valve are perfectly sized!