[Kingofl337]

The RadioShack unit is the same as the Vex Adapter. I've actually had better luck with the FTDI adapter then the Vex cable. Also, in general most people having trouble are using a Belkin branded cable, I don't know what chipset it is but they seems to preform poorly. Recently I purchased a Cardbus Express adapter and that is smoken fast. I'm extremely excited that Vex will be WiFi later this year as it will resolve most of the USB-Serial issues people are having.