I cringe to tell since the level of "all marine everything" is high, but here goes just for you Joel. The carpet turned out great. I struggled with paying $425 for Syntec carpet or paying $725 to a local inboard specialist to buy and install it. My decision, since I really wanted to play with it myself, involved two key points- 1. I had never done this so chances of a screw up were high, 2. Cost. ... I purchased the Smoke Blue outdoor carpet from Home Depot (comes 12ft by whatever you choose, I chose 9ft) cost me just under $60 (yes $60 dollars), DAP contact adhesive two cans about $60 total. So I have a grand total of $120 in the carpet. I just went to see my cousins 83 Nautique at the upholstery shop and his brand new $700 carpet install looks no better than mine. He actually threw a dirty word at me when he saw mine and I told him my cost. So if nothing else, I can replace mine 6 more times.
My only snag-- when you lay the adhesive don't put on a lot. I had a couple of bleed throughs as I painted both the carpet back and the floor (as recommended on the can) and was generous with the glue. Luckily they are hidden with the L seat and drivers seat. I would also wait for any last minute fitting cuts as the carpet laid a lot better once there was some wetness on it. Buy a roller- brushes take way too long.
So the big test will be endurance and color fading, time will tell.