I too have used the new Dural CI+ with no issues whatsoever, infact it seemed more stable when I fitted it, come to think of it, I didn't have any problem with the old CI, guess I was lucky not to have got a rogue batch. Nowadays, I try to use the Mapetex as much as possible, as there is only one layer, less to go wrong, it's cheaper, and adds less to the height of the overall floor. Also you can see the adhesive ribs through it when you are fitting it, so you can see that when you have pushed it into the adhesive that a solid bed has been achieved, superb product!