I took advantage of a 3 year introductory pricing offer by Good Sam last year. After 6 months of not needing roadside assistance, I kept reading very bad reviews from GS customers. There were enough of the detailed, accurate, negative reviews that I called and took advantage of their prorated cancellation policy. I will say they made it very easy to cancel and I promptly received a refund to my credit card.
I was a past member of Coachnet, and used them one time about 10 years ago. The service was excellent. But, it appears all of the roadside assistance programs were good in those days. Now, I can't find any company that constantly receives an A rating.
I don't trust every review I read on the internet, but when the sincere bad reports become the norm, it's time to give strong consideration who you are doing business with.