In my home studio it's a must have device. There's pretty much only two things I would like to comment:
1, The Crossfeed function is a great feature. It really does what it is supposed to do i.e. imitate the sound of speakers in your headphones, which is great for home studio use if you don't want make your neighbors go crazy when you listen to the same thing over and over again.
2, I would so much more like to see one pairs of outputs being unbalanced RCA jack outputs instead of three pairs of XLR outs. Who uses three pairs of studio monitors anyway?
Wouldn't we all like to play our mixes through our regular hifi-stereo just to see how it sounds?
Well, you can forget about it, because there are no RCA outputs!
I had to build myself a separate box to convert the balanced XLR signal to unbalanced RCA.