I have quotes from WW, Good Sam and ACC Warranty. By far the best quote on my coach was from ACC Warranty. They are A+ rated by BBB. I found all good reviews.
Their Premier Extended warranty includes Roadside Assistance. Unlimited towing (this is needed with my coach because it needs to be lowboy towed), unlimited tire protection, trip interruption, etc. and the best exclusionary package I have seen.
I guess I disagree with the last poster. I have seen bad reports from all companies mentioned here. When I use an independent source to look for reviews, I see nothing but 4 or 5s which is the best they can get.
I guess my decision will be to even bother with an Extended Service Plan, or bank the money and take my chances. None of these plans is inexpensive.
Don't know what else to say.