Let's say you were going to go with a normal Skyjacker 4" lift. $600. By the time you add the towbar front shackles, boomerang rear shackles, shocks, pitman arm, brake lines, extended track bar, and anti-swaybar disconnects....the $1300 that the monolinear kit goes for doesn't seem that bad to me considering the added 2" of lift and the improved ride, handling, and flex.
I might be wrong and regret it later, but my next YJ WILL have this kit under it. If I had the extra money and hadn't already put the 4" on the CJ, I'd have probably set it up with one. If this kit works as well as I have heard it does and from the little I've seen of it, it's what I've been wanting for years. I like to stay spring-under. The extra lift is much needed, and the monoleaf will flex more than a muti-leaf at that much lift.