I've got one
Very durable & solid, compared with an airdeck. Makes good use of the inflatable keel.
Easy to rig, compared with a plywood floor.
Not as solid as a plywood floor and you get a wave effect running the length of the boat, as it comes onto the plane.
Each type of deck has its advantages & disadvantages. This sits nicely in the middle and is a good all rounder. If you plan on removing the deck every time you use it, then a plywood floor is a better option. If the weight and size when rolled up isn't an issue, then it's a good fast way of getting a SIB onto the water.