I've got a set on my Gen 3 - no complaints, no issues and well made for the money.(like everything else, they have gone up quite a bit in the last couple of years - I think I paid about ?210 2 1/2 years ago)
they are a decent rearset (got some sets left over from my blade days) and not bad money.theres some debate on where they are made though as they are an exact match to the chinese ones you can buy,wether they have been copied by the chinese,or rebadged by joe (joe burns owns the company)is a hard thing to find out.
but,having used them in the past,had no issues either way and spares where easy to get back then,not so sure now though
Ive used Diamond products before with no issues at all.
You can buy direct from them to ensure its genuine. And price was just as comparable going direct.