Emergency Road Side Service is absolutely a "must have". The 2 most popular are Coach Net and Good Sam. Other Emergency Road Service plans have limited coverage and various restrictions i.e. AAA.
Most important features are: 1. unlimited towing milage 2. guarantee that you will only be towed to a shop that can actually repair your RV, not the nearest local gas station or shop that is not equipped. 3. There is no cash payed out of your pocket for the ERS service at the time of the incident. I have had Good Sam ERS for 20 yrs. and am happy with the service. Are ERS plans perfect 100% of the time, no. Occasionally there is a problem when you 1st make contact with a service representative. Not all service representatives are 100% RV knowledgeable which can create some miscommunication issues but usually the issue is resolved satisfactorily within a few minutes and your towing service gets taken care of. All my personal vehicles are covered as well.
On 1 ERS incident, the springs broke on my trailer and could not be driven, a long flat bed truck was dispatched and my trailer was wrenched onto the flat bed. The nearest service center that could replace the spring was 30 miles away. I just showed my GS ERS card and no cash was paid. The driver told me that the cost of the tow would have been $1250 out of my pocket without GS ERS service:):)