Sea dek people, here is why I did not do it. I may have posted this but just in case...
Two reasons, cost and up keep.
The installer I had, from around the Davis CA area, set my expectations at around $2K (and I mentally just went, ok, $3K for reals). After they came out here and measured the boat, their quote was around $7K, I think over that. I love my boat but $7K to make the deck look nicer? No thanks.
Up keep. It turns out that Sea-Dek is harder to clean than just plain deck (if the internet is to be believed). I've gotten more hard core about cleaning my boat and I can totally see it. A hard surface will let stuff go more than a sort of foamy surface.
So I passed, my boat is a hard core fishing boat, that is all it does, there are blood and guts and everything else dumped on the deck every time we go out.
I think that if you were Magic Bill and you don't fish, yeah, I bet some Sea-Dek on his boat would look fantastic. I'd want to be on that boat.