I just received mine from Amazon this past Saturday and installed it on my tandem.
It works perfect, and Amazon's price was significantly lower than the other on-line sellers for the identicle product.....$36 vs $60 everywhere else.
One click ordering, low shipping charges, and then only a couple of days for it to arrive.
Very pleased!
Now I'm just looking for a solution for my triple tandem's 1 1/4" threadless that is not only short reach but tall with a short (35-40mm) clamp.
Probably have to go custom.