There were a few guys running BDS kits on their YJ's in my club. They have taken them off. They too were enticed by the military wrap and good warranty. The springs are too stiff and do not articulate. The ride is bone jarring and VERY uncomfortable. A stock YJ will ramp better than a BDS equiped YJ. One of the guys in my club is the BDS rep for our area and his YJ would almost lift a tire going over a curb. He just bought 4 revolver shackels to help out. I only have 1.5" RE add a leaves and a 2" body lift with 33's and I out flex the BDS kit. My advice would be to look at the RE 4.5" extreme kit and some revolvers. Don't buy BDS, your back and kidneys will thank you.
Hope this helps.
YJGUY.