This is an amazing unit if you need multiple in/out and you are in a budget.
Now if you don't need that many in out, add 100 € and grab a unit with better pres / D/A converter.
When maxed, ( sm57 and any other dynamic mic that needs a lot of juice) the pres are noisy.
When the level is way to low ( when mixing this is a must) sound will only come out of the left speaker. This drove me crazy thinking my speaker was faulty, yet after swapping then the same issue persisted.
The pres are ok, transparent, no character
It's a great unit to have multiple I/O, for the price I don't think you will find something better. Yet after a few years you might find yourself looking for a better unit