It is the slimming world crispbread - it is an acquired taste & you will either love it or hate it (bit like marmite), it is a speed food & you can buy it at either your group or Holland & Barrett normally stock it.
I like it personally, keeps me regular that is for certain!
I use mine in porridge or as a snack instead of ryvita, with tomato and ham or cottage cheese on.
I don't make cakes with them though because I would eat the whole thing, and anyway, if I have cake I want the real thing and not an imposter!!!
I can see why they would be an acquired taste, however, I find them very filling and usually have them and 5 laughing cow triangles with tomato throughout the day. They do really need something to moisten them.