I ordered mine off amazon the other day from the same company. It doesnt charge very fast. When connected to my mabbook pro with both data enabled and disabled, the highest charge rate I could get was 160mAh. When connected to a usb hub that was powered, I managed to get up to 200mAh. And when connected to a wall outlet, it maxed out at 450 but averaged about 350-400mAh.
On the same connections, with a known good cable im easily able to get 500mAh, 700mAh, and 1200mAh respectively.
So despite the build quality, in that I was actually fairly surprised that it was pretty good, I can't say I will buy another one. As cool as it is, I have too many other cables that charge much better.