Amoco Motor Club and AAA used to have great service and reasonable pricing -- when I drove a very old car and could expect to need a tow every year or two it made sense for me. Both had ancillary benefits as well.

Amoco Motor Club has gone the way of the dodo and AAA is very expensive for what they provide. If the warranty on my car provides free towing service, I'm glad to take advantage of it, but otherwise I don't see the utility in paying for that kind of coverage.