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!
Leveling Kit verses 5100 Series
I had a leveling kit on my FJ but I decided I wanted to install 34 inch tires on it. For a little more clearance I decided to give the Bilstein 5100 Series Shocks and Struts a try. I am extremely pleased with the result and product. It looks very nice on the FJ TRD and out performs the original TRD Bilstein shocks when I go off road. And the FJ looks nice with its higher stance and larger tires. Far easier to install than the leveling kit was and with greater lift.
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.