I have been using my MixWiz for over two years, minimum two nights a week useage in/out of clubs and that board has worked perfect.
It even with stood a nasty fall in a night club while in use and never skipped a beat, I still have not been able to take the board out of service long enough to take channel one out and replace it as all of the EQ knobs got mangled in the fall

The channel still works fine even with all the bent and twisted knobs
I have a new Yamaha MG16CFX (something like that), and a Mackie 1604vlz and neither of those boards come close in operation or performance of the MixWiz.
The Yamaha preamps suck and the Mackie is just a piece of crap with all of the ribbon cable issues that plague it.