For the price it retails for, the interface is amazing in terms of both sound (24-bit 192 kHz for this price!) and build quality. Unfortunately, this comes at a price of not being able to directly monitor your input in stereo - each input has its own channel (L for input 1, R for input 2). I assumed this is going to work this way for the back outputs and it wouldn't be a big deal for me then, but the headphone output is the same. If you need stereo, get an UMC204HD or, even better, UMC404HD.