We have no reports of problems with genuine Ross-Tech USB leads. We ship 250 USB leads for every serial we ship. Serial is simply not accepted by most users today.
On the other hand, we are constantly contacted by those who go the inexpensive aftermarket wire route that incorporate USB to Serial converters as Slimy mentioned. Those tend to be problematic. Also the wire suppliers fail to ship the drivers needed to get them working. So, if you go the inexpensive route, work reputable dealer so when things do not work as expected, you have someone to turn to.
On the other hand, we are constantly contacted by those who go the inexpensive aftermarket wire route that incorporate USB to Serial converters as Slimy mentioned. Those tend to be problematic. Also the wire suppliers fail to ship the drivers needed to get them working. So, if you go the inexpensive route, work reputable dealer so when things do not work as expected, you have someone to turn to.