If you've long since lost your original 30 pin cable, or you've been let down by amazon or ebay knock offs, this one will serve to remind you that Monoprice makes quality products. This works perfectly with my ipod and interfaces perfectly with my car stereo.
Cable seems to work fine. However, the USB plug end is very hard to push in. Afraid it might damage the port on my computer. Tried it in several ports and compared to other cables. To confirm that it is the cable and not the port.