Overall, the service was okay. I was disappointed that the service repair man charged me an extra $200.00 for a tune up, which he said was required in order to replace the plain loop cable. I didn't feel like I had any other choice but to accept that charge because he told me that in order to replace the cable, that he had to loosen the tension on the garage spring and after replacing the cable, he had to tighten the spring, and this is considered a tune-up. I think this should have been considered a part of the job of replacing the cable. I'm still not sure how loosening the spring and tightening the spring can be considered a tune up, however, what could I say.
Also, when the repairman was about to leave, he told me that I had to open the garage door manually, because the track was off and he did not have any track with him. After I told him that I had to use the garage door opener and I expected the repair to include correcting the problem, he fixed the track.
If my situation wasn't an emergency, I would probably have gotten another estimate to be on the safe side, because when I got the first estimate, he recommended replacing everything with exception of the garage door, which he said would cost me over $1,500. I hope this is helpful.