I had them install a locker and gears I bought from them along with c-clip eliminators in a mustang I used to have. The axle leaked out the ends onto the brakes pads and would leave little puddles on the ground. Tried to get them to fix it and was told if I drive it on the street I had no warranty. After I tried to fix it a couple times and replacing the rear brakes a couple times I ended up selling it. The guy that bought it told me they cut the axle housing crooked so the c-clip eliminators would not sit flush, he fixed it and it hasn't leaked since.
The guys I dealt with there were assholes and I will never use them again or say anything good about them.