I really like the versatility of this mixer: lots of input options, multitrack USB (Windows drivers work fine), built-in SD recorder and AUX/FX/Phones/Main/ControlRoom outputs. Having all this functionality in a single mixer is the reason I bought this model, and it does not disappoint. I like to easily switch between working with and without a computer/DAW, and this mixer is ideal in that regard.
What does disappoint is the following:
-The balance of the different channels is not calibrated. For instance on channel 5/6, with the PAN set to CENTER, the right channel is about 1.4 dB louder than the left channel. I've found this to be the case in three different AR8c mixers, so it's not just mine. This can be 'fixed' by slowly panning to the left using a mono source until the VU meters line up, but I think this is sloppy for a mixer in this price range.
-There is no display for the SD recorder. I use it to record my playing when I don't want to use a computer, and you can immediately listen to it, but finding older recordings is a hassle since there's no visible track number or date etc, so my advice would be to use a mic to voice-stamp the recording at the start.
-The mix knobs are ofcourse not as nice as faders, but it saves space so it's fine. But I've noticed that you always need to use two fingers to turn the knobs, because with a single finger the knob tilts slightly, pushes into the sides and can't be turned anymore due to friction.
In the end the benefits outweigh the issues, and since this is the only mixer in this pricerange with these features I've decided to keep it.