We're using an older 19" one for rehearsing and monitoring live. I think it's a good unit for the price, very reliable so far.
Downside: it has the usual Behringer channel crosstalk (on higher volumes).
I like mine ok...then again, I've never really used it in an environment to where more than one channel was used at once. I have used it on and off to have multiple signals coming into a single mix (pc out & firepod out).
I have one of the 4-ch units. Great for tracking. Reliable, feature packed, and low cost.
If someone breaks it it'll be cheap and easy to replace.
I would not use it for critical listening. Too much noise and coloration.