I'm building up a GR-02 at the moment for a friend - I'll make a full post in the metal frames forum section when the build is done in the next few days, but I can say that the frame is very well made, with neat welds, good tolerances, and everything's aligned. It was also surprisingly light! Unless there's serious issues with its ride quality or handling - not likely given the experiences of others here - I can definitely recommend it.