I have had four Behringer mixers, and have had excellent luck with all of them. As far as I know, all but one is still in service after quite a few years.
I had a really small one, 6 channel I think, on which I broke the power adapter. I didn't repair it because the cost of a new one would have been about the same and I didn't need it anyway!
I also had a 12 channel and a 16 channel, both of which I used a lot with great results.
Having said all this, my local dealer no longer stocks Behringer because he had too many returns for service.