I have one and can't say enough good things about it. This box has completely flown under the radar for the tapers. The preamps are very clean and transparent. For an acoustic set last weekend, I ran 45 dbs of gain and did not have one bit of noise. In summary it can use an external battery, small, fits in bag well, transparent clean preamps, nice headphone output, level meters. For an added bonus, mine has been used in conjunction with a mac as a firewire device without issue. Now that is some double duty.
This is a box that someone should judge on the sound instead of what they think of the mackie brand, past or present.