Its a great piece of kit.
We had some software issues at first, but we've been using it for more than a year now.
5 piece band 2 x geetars, bass, harp, drums and 3 x vox.
It works and works hard, judicious use of channels and inputs makes it extremely adaptable.
Nice and quiet on the inputs, even thro effects, I'd recommend it.
makes the cable runs easier too.
We considered an upgrade to the U16 but really, we haven't needed to.