Good Sam has been very good to me. I'm usually not around home when I need them, and I wouldn't know any facility or mechanic to have a preference. Once they towed me 80 miles to the nearest facility. That's close enough to 100 to make me glad I have unlimited miles. Turned out (after the tow, which was on a Sunday) that nearest facility no longer worked on motorhomes. They had to do a second tow...and that time they agreed to tow it to a facility that I chose (based on my internet research/reviews).
Another time, Good Sam sent a mobile mechanic (a long way) to me as I was stuck in a campground in Glacier Nat'l Park, right in the middle of the campground road.
I think Good Sam and CoachNet are more focused on RVs than the other plans. Anyway, I also have AAA Roadside Assistance because of the 100 mile to anyplace. Reason was many years ago I had another service (not GS) that had same rule as GS. It was a Sunday and they would not tow me to my house where I use a mobile mechanic, even though it was less than 20 miles.