Firestone Ride Rite airbag helper springs are a good product. I put them on my coach a couple months ago and they really improved the ride and the handling. My coach is suffering from a sagging spring on the driver's side front and the Ride Rite is able to augment the spring to help re-level the coach and improve handling by doing so. I opted to go with the on-board compressor and the 4-corner control system as well so I can control the airbags whenever I want without having to pull out an external compressor. I did the installation myself, in my driveway at home.