Very simple device. Simply put. if you've got a couple sets of speakers or a couple outputs (computer, soundcard, ipod) this thing really simplifies everything.
I've got mine configured with 3 different speaker configurations. Speaker A - Near Fields, Speaker B - Subwoofer, Speaker C - Club sound system. Then i've got my computer, soundcard master out and
A couple other features is the 4 different headphone outs. So if you've got a couple people over and you need to mix on headphones everyone has their own volume control! Also there is a very handle MONO button which is great to check when you are in the mix.
Its one of the least expensive monitor controls and It works great!
LED's that indicated Volume Playback Level DIED only one month after the 1 year warranty expired. It seems to be a comment problem according to reading some forums. Its a cool unit and it works great (haven't used the built in mic so can review that) but its sh*t quality based on the fact that its a comment problem with their LEDs.