I use this for linking a little mic to the computer for recording in line-in mode.
The mic is pretty low output, so I have to use nearlly all the boost functions available
on this unit, which must be a pretty good test.
The noise level is acceptable for my near-broadcast level requirements.
That's in terms of background hiss when recording just spoken voice in very quiet rooms.
Case is made of metal and overal build quality very high.
Inside, if you were thinking it would be very simple, behold the large amount
of additional passive and active components.
Downside - single channel, so you might need more than one for your application.