Re: Anyone use Dri-Dek?
I've used it a couple of places. If your deck is decently protected using a good paint, gelcoat, or bed liner you won't develop permanent rubbed-in dirt any more than you would on the deck without it.
The only thing to be careful of is not cleaning it regularly since any mud trapped under the grid can contain enough abrasive particles that it can act like a coarse sandpaper if people walk on it. You can avoid this easily, just be sure to pull it up and wash down the deck and grid after any trip where more than a little mud gets in the boat.
It will keep the mud off your legs and feet for the most part, unless you get enough to fill the grid.
One more thing, it stays in place reasonably well, but if you want to avoid the occasional annoying fold, slip, or catch, I'd find a way to attach either snaps or clips to hold it down in place. I used a combination of small bolts sticking up out of the deck at the corners or edges and wingnuts with washers to hold it in place, which works well but looks funny if it's anywhere but the hidden edges of the deck. Next time I'll probably get some aluminum edging or even better some powder coated steel channel and use that to hold the whole edge down.
If you cover your whole deck with the stuff it may slip less.
By the way, almost exactly the same stuff is sold at Menards and other big box stores for less than half the price, but it only comes in black.
For me, I used it for better traction and for leg relief in the boat, plus keeping a bit drier, not mud.
Erik