Really good!
I just did some work on an rg1570 and this thing as actually very simple and effective, in a sort of 'why didnt someone come up with it before' sort of a way but clever enough that you can see why it took so long.
Well thought out and effective design.
I dunno how you lot out there that actually use trems think about how it feels (I never use them - all mine are tremolno'd), but its quite an impressive piece of kit. Easy to setup too.
Cant speak as to durability, quality of knife edges and what have you - the guitar was very nearly new, and the trem basically unused.
Just thought I'd tell ya: there are people round here that are interested in such things.
That will be all.