yes, I have great results with them .. and have wheeled hard with them on.. no problems whatsover. just follow the directions, you may have retaining clips around some of your studs be sure to remove them so the spacers sit flush, I used red locktight on the inner nuts and studs... (not the ones that hold your wheel on, the ones that hold the spacer on get the locktight) check em after about 100miles to see if any have worked loose which will be unlikely with the red locktight... check again after about 500miles and I also check mine everytime I rotate the tires... which in a perfect world is 6,000miles
YellowTJ also runs a set... hers are 1.25inch I believe and mine are 2inch.