You get mixed reviews about almost everything, but my experience with Behringer has always been positive.

I've been running two USB interfaces with the superb Midas preamps every day for almost ten years without a single problem. I've also got a variety of other Behringer products which seem to be well built and have never had a fault. Also on the plus side - their products aren't on the expensive side. I would think that the mixer is likely to be as reliable as anything else.