I've installed one for a friend on his 97' Chebby truck. The results are wonderfull! The truck rides very nice (and sits lower too), he added effects on the sides, front, and back and when he parks illegaly (often), he lowers the truck until the effects meet the ground (so noone can tow it away). I don't know exactly how much he paid for them, but I'd say only install them on a car/truck you intend on keeping for a long time
