From first look nice 1u rack preamp with great price and features (what I was looking for) but in my case too sensitive with just 1/4 knob volume already at full volume and with 1/3 over with lots of distortion. In back there is remote volume control option which helped with sensitivity but made much worse with distortion.
Not usable with mobile rack setup.
Only usable option wound be stationary installation where nobody could touch it.
Improvement could be done with gain controls in back for each input.