LOVE it!! We have a '99 350 Mariner. It's especially great in the winter/rainy season when we have the full enclosure on. With no external 110V plugs on the boat I use the hatch to run the cord for the little/portable heater that I use on the bridge in the winter. It gets it nice and TOASTY! Even in the 30's I can boat comfortably with shorts, t-shirt and a light jacket. The heat is a $20-30 unit from Wal-Mart, auto-shut-off if it tips AND the best part is that it doesn't get hot enough to do skin/vinyl damage...I've tested it, trust me!