Had a recent experience with Coach Net. Drove across from Zephyrhills FL to Sebastion FL. Had checked tires for air before departure ( I have air compressor aboard) and tires were all OK. On arrival, noticed that the right front tire was low. Called Coach Net. They would be happy to come and replace the tire if I had a spare but they would not do any repair to the tire as in repairing a flat or replacing a valve stem because of liability risk. I called a local tire store and they came out next morning. The problem was the valve stem pin - it was sticking. Anyway, the gentleman checked all stems, replaced two, and was on his way in about 20 minutes.
thankfully, I was in a safe place rather than on an interstate roadside. But no question I was not pleased with Coach Net. Maybe this is a problem with all the roadside services. But I'm researching which company to use henceforth.