This review is more technical than the others. I own an old '93 Toyota Corolla. The A/C finally conked out. In the valley, that is bad news. I knew that the A/C had to be converted from R12 freon to R132. I took it in to R&M. I got an estimate for replacement with the proviso that they would check the system out during the conversion. Sure enough, since the A/C is so old, the O-ring and another part had to be replaced. I approved. After a few days of driving the car, instead of blowing hot air, I now get cold. The cost was very reasonable. My car is 24 years old!Secondly, over a year ago, I took in my Corolla to R&M. The previous smog check showed that my NO (nitrous oxide) reading was right at the max acceptable reading (504ppm). I asked for an EGR valve replacement but Rich recommended an EGR service which should suffice to drop the NO at a lower cost. I just had another smog check this month. The NO reading at 15mph was recorded at 194 ppm. I knew that the car would fail had I done nothing. I did not want to pay extra cash for a smog re-test. Also, no need to run around trying to find a shop that would do the work. I hate frantic. By the way, VW has just been flushed out with a huge NO scandal. R&M does not fix VW's, I think.This is my second review on R&M.