I replaced the clutch on my car in another store and when I picked the car up the Check Engine light was on. They lied to me and told me the Check Engine Light came on before they did any work on the car, but they told me not to worry as they checked the O2 sensors and they were ok. They said that the light would magically go away after driving it for a while. The engine light not only didn't go away, but stalled on me 3 times, it was idling rough, felt like it was choking, so I took it back. After 2 days, they gave up on me and told me the computer is bad because it thought the O2 sensors were bad.
Took the car and brought it to Sal's. 30 minutes after I dropped it off, he called me and said to me "Whoever replaced your clutch, did a lousy job. When they put the transmission in, they accidentally cut the O2 sensor wires and instead of replacing them, they tried to clap them back together". My circumstances were that I needed the car to be fixed as soon as possible as I was shipping it overseas the next day. One day later at 8 AM, I got a called saying "Your car is ready".
Wish I had known Sal's before.