no problemsProduct seemed to work as advertised. No problem with the driver or serial ports.One comment is that the you need to use trial and error to find Com1, Com2 etc. Apparently these are assigned randomly by the computer so the numbers on the plugs don't corrispond to the com line.This item works exactly as described and is very reliable. It come with good instructions. I would purchase it again.Works fine on Linux.Sees 8 ttys; /dev/ttyUSB0 - 7Connected to stack of Cisco switches/routers all working fine at 115200 baud.No external power needed.It arrived on a weekend like 2 days after I ordered it, which is a plus. Otherwise, it works perfect for people doing console connections to networking gear, such as a Cisco lab.On the Pi, you just plug it in and away it goes, and creates /dev/ttyUSB0-7 for you, which you can open with minicom, or something like ser2net to forward TCP ports to it.I only tested with 4 of the 8 cables connected, and at 9600 N81, but it works fine without any 5VDC adapter so far.The device enumerates as 8 different entries of: Future Technology Devices International, Ltd FT232 Serial (UART) ICThe only thing I found odd was that it has support for a 5V DC plug, but doesn't ship with one. Strange, but the fact that it runs off a Pi makes up for it, IMHO.