Good quality microphone amplifier, well done in general, convenient (even if a bit heavy). Was used with condenser mic and other sources, sound completely OK. The only thing which I did not achieve is to use it as audio interface for the computer so you get USB sound output from the computer mixed with the master stream in the headphones but not for ADC input, so you can both control what is going to the computer and hear what is going out. May be this is my fault (I'll they to read the manuals again), but what was easy with, say, Yamaha MW10 or audiogram, turns out to be impossible (for me). But you can hear the computer output usb sound, and you can hear your input sent to ADC and the computer, both things are completely OK if done separately