First, it is by no means a bad mixer. In fact, probably the best for the money. But, I bought it as an alternative to a Behringer X32 Rack and I have to say, I still prefer the X32 Rack to almost all gigs.
It sounds the same as the X32, has the same excellent FX selection, but the features are limited: no delays on outputs (the biggest deal for me), less FX slots, limited input/output, lack of USB player and many other smaller grievances. The iPad app is also worse than the X32.
The built-in wi-fi is downright unusable with the default antenna. changing the antenna to a stronger made it at least usable, but you will still be better off with an external router.
But what it has going for it is the size. It fits in any backpack and is sufficiently light to carry around by hand or on your back. So for smaller gigs where you only have to bring a mixer or sound interface, this is perfect. And of course, the price. There is also the more expensive Midas version, but in my opinion, considering the jobs this mixer is aimed at, the Midas is not worth the money.
So in conclusion, a perfectly adequate mixer that sounds good and still has a good feature set. Recommended if budget and/or portability are a big concern. Otherwise, I would say get the X32 Rack.