Re: Towing services????
see the same discussion under "Sea Tow v Boat US." You don't have to be a member to get towed by the companies; it's just a matter of paying all at once or in annual installments they call membership. The insurance you pay for probably covers the first $500 or so anyway. sine they tow anyone, there is no "peace of mind" by joining; it's only a question of math.
As for which company: This gets discussed a lot. The consensus is that it depends on the operator/franchisee, not the company. Stories about good or bad experiences are irrelevant unless they are about the same operator you would use.
So unless you have local info, go with the one that will give you the shortest tow from where you would likely break down (including from HIS dock-that's where the meter is turned on). I'm not a member of either but I keep the numbers of the individual operators, so if I need one, I can call the closest one to where I am at the time. My boating takes me to different zones, as it were.
You have to look at a variety of factors to determine whether you should join. Relying on other boaters is one factor, and that swings with the size boat you have, among other things.
Some comments here are guessing about tow costs. go to the source in your area and ask. For me, the average will be about $800. Although I've been on the water 50 years and never needed a tow service*, since I got a larger boat (21') that might require a tow service 4 years ago, I have saved $640 by not joining. With my $500 insurance and the $640, I am "covered' for a $1,140 tow,and every year it increases.
*I've had plenty of break-downs and tows, however. And half of my boating is in a remote area with no tow service other than Coast Guard.