I own two of these and they are junk, which is too bad because the sound quality is significantly better than the built-in PC sound, and I like the form factor, especially when paired with the massdrop O2 Headphone amplifier. It lacks a power switch, and will frequently just stop passing out audio requiring that I unplug it and plug it back in. This is especially annoying when I'm using it with a conferencing application, as I have to reconnect to the meeting and miss out on content. Both of my units do this on several computers (I have one for work, and one for home). The one at home, and this is really hard to describe, will occasionally build up some static noise or feedback that gradually degrades the sound quality until it is rebooted. With both of these issues, my annoyance with them would be far lessened if the device had a power switch with which I could reboot the device quickly.