I have Sea Two coverage and have been very happy with them, Actually had to use there service once (late night) and they came through like champs, HOWEVER,
A few months back while there was discussion about the STM folks and which organizations were defending boaters rights, Sea Tow came up a zero. I e-mailed them personally and got no respons (twice). Boat US on the other hand has info right on there website and openly discuss the issues as well as finance council to protect our rights.
I am one hundred percent for preserving our environment, I do believe there are some extreme views out there that will do whatever necessary to achieve their narrow minded goals. I will do whatever I can to support the organizations that atleast make an attempt to keep these types honest.
Just something to consider, Im going to when its time to re-sign