I bought a set of orange blank caps from him a while ago and had no issues with the seller. The caps are alright, no complaints there, but i haven't really had much to compare them to.. they do feel a slight bit 'hollow' compared to my ducky pbt though.
A couple pictures on my Ducky. (add the "."s) subconsciousboredom.blogspot com/2011/12/ducky-9008.html