I second (or third) that OB is a great company to deal with. Made in the US and a very nice shaft.
I recently bought a complete cue with OB-1 and really like it. It is easy to over spin but that's a problem I actually like. Made my game much more consistent. Softer hit but to me, much better feedback when I do something stupid.
FYI, I have a Kamui Black Soft on my maple shaft Helmstetter and have a Kamui Black Medium on the OB-1. I really like it.