I had AR do my coilover install. They gave me the best price for install, but that was before I knew about ProTek. I was going to have ProTek do my DP install but I decided to go another route and not mod my 335 anymore.
AR seems to have done a good job, but I did not get a corner balance print out and I told them I wanted my coils at a certain set up and they did not do that. They said I could bring it back in and they would change it but I have not been back.