Over 37 years, I have carried ERS.
I have used 2 major ERS companies with satisfactory results.
I have used progressive ERS with satisfactory results.
I currently use GEICO ERS, and have had satisfactory results for the last 4 years.
However, I discovered that neither of the 2 major ERS companies would tow my vehicle if I was involved in an accident.
My Research led me to drop the major ERS company, and rely on my insurance ERS provider.
GEICO will tow me in the event either vehicle is damaged in an accident. GEICO ERS covers me for other roadside issues at a lower cost than the major ERS companies.
Don't have pets to worry about, so not an issue for me.