This is my second audio interface and I wish i'd bought this one first.
It's compact so doesn't take up too much room on my desk and has a good weight to it too, so it doesn't come flying off the desk if I walk too far with the lead attached.
It's also got output to monitor mix as well as headphone mix which makes life easier too. I've had no problems with latency at all. An added bonus is the phantom power so that I can power my condenser mic.
The onyx is USB powered so I can use it with my PC and laptop.
Perfectly hooked up to my M-Audio speakers I bought at the same time.
I'm using a macbook pro with OS X El Capitan and this device works perfect on it. No need to download any drivers or something else. Listening to music, mixing all day long - no bugs, no problems, everything is perfect. I can't say any words about quality of the sound in comparison with other devises such as u22 or 2i2, but Onyx Black Jack by Mackie sounds great by itself. And made like a tank =) And it has two inputs with two DI's, thats important to my, because I'm recording my guitar signal in stereo mode right through this interface, very convenient.
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