have always found the R Kem one to be good for the price of it. Mind you couple summers ago when was really warm the resin repeatedly went off before could get the bars in
Had a recent job where we put some pads in for steel posts, engineer cocked up and changed the sizes of pads on drawing revision (relating to another part of the build) and didn’t even tell me. Spotted it luckily. Explained that I couldn’t change them as the posts would be pissing in the wind with weight of house above it - ended up agreeing we could use chem fix and rebar to tie them together but insisted we use Hilti top of the range stuff, cost us about £300 for resin and gun!! Hilti rep laughed at it, said the resin we were buying was way over the top and designed for industrial scale structural fixing underwater
Customer had to cough up, ignored recommendations from architect on which engineer to use originally and found this muppet on MyBuilder