I’ve seen these also, good for when you need a quick set up or easy transport/storage, personally I really like them especially the lava one. I was a bit put off by the price but nothing is cheap nowadays I guess.
I have a gaming mat for Deadzone in the same material. I think it works fine. The lava theme seems to have a rather obvious repeat in texture however. You can see the same details repeated every few centimetres.
I read somewhere that it weighs around 3,5kgs (which in my opinion is a lot), and that it rolls out perfectly smooth thanks to the materials used in constructing it.
Personally, I play on my Citadel grass-mat (which has a cloth backing), which weighs a fraction of the other’s weight, lays perfectly smooth as well and which was cheaper to begin with.