i have had hydro turf on the decks in my boat for about a year and love it. its easy to clean, comfortable, doesnt absorb water, and is pretty durable. i have it over top of aluminum but i doubt going over plywood would present a problem. i used gel contact cement, which i what i read a lot of people recommending, and even to my surprise i don't have any adhesion issuses after a year. the only downside is the price.. so i bought two sheets of their 'b' stock and am very happy with the results.