Dr. Nick's was recommended by a friend. These guys are car nuts and work on cars even on off hours. They took my car in and tested it throughout the day, since the transmission was not always giving it problems. Sure enough, they discovered the problem and diagnosed it correctly. Since my car is from 1999 and has 150,000 miles they gave me the pros and cons of rebuilding the transmission. I had them rebuild, it was in the ball park of other places with a guarantee. So far, no problems!