I don't have one. I only personally know one person that does and his (b17) took a few months, he's a messenger in Denver. But all things aside, I do believe you, he swears by his and he's not one to keep something he doesn't like. He'll turn it for a profit instead.
I plan on buying one. I would own one now but it would just look wierd on my beater Lager. Once I can build the bike I want or once I get a geared bike I'll probably be purchasing one.