I had some Sea Dek in my poling skiff. I have Safe Floor in my boat now. Sea Dek was hard for me to keep clean. It always looked grungy. And you have to be real careful with a car wash wand, the high pressure stream will cut it if you get too close. It is soft, it feels nice on bare feet and it looks cool but I would not want it for my whole boat deck. Something like putting it on a poling platform, casting platform or maybe on top of a cooler it's fine. I had pads made for my under the gunnel flyrod racks so the reels wouldn't bang on the sides. Stuff like that it is nice. I just personally wouldn't want it for my boat's deck.
For a whole boat deck I much prefer Safe Floor. It is very durable, easy to clean, looks good longer and can be repaired if needed. If you did have an issue they can pull up the bad spot and replace it with new Safe Floor. The only downsides vs Sea Dek is Safe Floor is heavier and it isn't as soft on bare feet. But it is way more durable and highly slip resistant.