Stoptech brakes, anybody used them?

[Gaz.]

I\'ve been offered some Stoptech St-40 calipers second hand.

Now firstly, I\'d never heard of them, but it appears they have been going since 1998 and have a good following in the USA. They also seem to actually come up with their own designs and innovations which I like, and appear to be a quality product.

However, I\'d love to hear from anybody that\'s actually used them to know what they are like?