Cost is not much of a factor, as the AIRBAGIT system is about $3,600 shipped and the Firestone about $2,200. I've heard bad things about the AIRBAGIT, as well, but wanted to hear from the experts- those of you who actually use these systems. The main reason for wanting the AIRBAGIT is due to actually replacing the leaves with arms and bags, but don't want to buy crap.
I think I'll get the R4 Tech and Ride Rite helper springs in the front and save some cash.