Haven't ever tried or seen those?
For the price of each you could go with a 1/4 foam board. Home depot sells it as an underlayment. 1/4" luan birch plywood. Build all your walls cabinetry on top of that screwed all the way through the steel platform your are building on/in.
Then use the floating floor under lay and the floating floor in the walk,work,visible areas? I might catch some slack here for this idea but that's ok.
I think a floating floor that expands and contracts and even the instructions say for a house install leave a 1/4" on the edges and not to nail the base boards down tight to allow room for movement and I have seen that in the floating floor I did in my house and didn't read the instructions? I put it in like a hardwood floor?
Some install there entire floating floor and mount/build on top of it? I don't reccomend it but I have never done that so I don't know how it did or didn't do for them.
What I said above is the idea I went. The luan board gave my wife and I a clean slate to start layout ideas with pencil marks(she was a res. architect at the time?) we had a few debates? I would recommend 1-1/2-4" wide painters masking tape to mark the walls to build if you go that direction.
I used sheetmetal stud framing for mine which left me with a 2-1/2" finished partition/wall for everything I did. If you use 2x4"'s it will be different.
That's why I gave a wide range of tape for a layout and expect it to move around until you get what makes you happy.