Like a AAA type service? For me, yes. I have locked my keys in my car (which is my own fault, but still) at least every half a year for as long as I've driven. I have also had the clutch shoe fall off a car, making it undrivable, the alternator belts have rotten and fallen off, killing the battery, and actually had the engine straight up stop in a car I was driving while I was on the interstate. If you have a nice, new car, maybe it wouldn't be worth it. I keep expecting AAA to tell me they won't sell their services to me any more because I use them so often!