i used alot of their stuff a few years back some good and some i didnt like ,had a few problems with firmagrip on plastered walls even after priming also their bucket flexi was a bit hit and miss in the past ,the rapid flexi(stone set) has a good bond strength and goes off quick but its not good for bedding up and I found that i would go through more adhesive kilo/m2 than other brands i was using at the time ,love their levelling compound the nivdur s and nivdur plus both excellent grey grout used to be a bit patchy and the stone set grouts i couldnt get on with, the 2part flexi is a good product, its been a while since i have used their stuff to be honest probably about 6 years so they have probably got a lot better since then