Pretty much all I use, bender fix rapido, cheap as chips smooth, flows well easy to work with, sets like iron!. Benferflex rapido doesn't go off too slow as some flexi does, leaderflex guaranteed onto ply (read the back of some other brands, not all flexi guarantee onto ply). Benferflex c2 standard set flex (not much that won't stick!) perfect for porcelain stoneware, annhydrytite does what is says on the tin and finally benfergrip (my personal favourite) large format tiles can be hung from datum line down with no slippage, seriously I've hung meter x 300 creamics with no baton using this stuff.
In terms of product support I've used these products constantly for about 7 years now and not had a single issue, if I did im sure my supplier would address.
Plus the grout is very very good to work with, compared to mapaei for example which I hate using as its like chewing gum full colour ranges are available,
But that just my opinion
