The seller is awesome. A useful authenticity check. The only small issue with the shoe is that it is harder to get into it (which is the prize to pay for adding more stability). This product was better than expected. Bluetooth connection makes it easy to pass around with no wires, able to mute locally, a great product to fit the need. Should you pick one up? Heck yea dont even think about it just do it. Edit - the t-track Im using is also made/sold by Powertec. Works on my many-years-old Performance Bike stand. After buying and returning several "well-known name brands" from a local electronics store, most at or above $100, I nearly gave up, thinking that they all were awful. In the other case my husband had to drill the hole a bit larger to accomodate the screw.