The current main deck is covered with 2 inch thick wooden planks. Not quite sure which wood they've used but it's pretty beaten up and may not be the most suitable for the tropics and/or barefoot walking.
Other surfaces are just plain steel.
Flexiteek is nice for new construction when you have a nice clean deck. Same with MarineDeck, an innovative cork-based product, my favorite until I discovered Solovan. In my case, a conversion, deck preparation would jack-up the cost of an already expensive product even more. So Solovan, an expoxy based material is probably going to win: less aintainance, better suited to apply on rough surfaces or places where different thicknesses are needed and, the most affordable solution. It looks pretty good too as you can see.