The lowest level membership is worthless, you only get 5KM of towing, then they start charging. The $120 membership has 160KM allowance per tow and a lot of the service charges that apply to the basic membership are waived.
That being said, AMA has lost money on me the last 4 years I have had it. Has probably saved me over $2000 in tow fess and it will take them a few claim free years to recoup the cost. I consider it cheap insurance to have if you ever need it.
See Crank. See Crank Walk. Walk Crank Walk.