I am also one of the many satisfied customers (no relation to anyone, never worked there, etc.), just browsing through threads and thought I would put in my .02:
I was very pleased with my order. I had one item on backorder that I was emailed about, it was shipped out with upgraded shipping, just like the rest of my order. I had also forgot (despite the reminders on the page) to order the vacuum lift pumps to go with my CPR overflows, and emailed them right away (11 pm ish). The next morning, my stuff had already gone out, but they created a new order to send me the vaccum pumps, same upgraded shipping, no new shipping charge.
Also, throughout the process I emailed and called with several questions and always received timely response.
I have been extremely impressed with Marine Depot, so I felt compelled to comment. They have definately earned my repeat business.