Feature:
XLR out, Line out, guitar out (for a tuner), EFX loop, phantom power capable, it's got it all.

Quality:
Heavy steel case. Looks great. Should last forever.

Value:
No Preamp - DI comes close to this price point for the features...

Desirability:
It really is a God-send to acoustic guitarists who employ K&K pickups. Of course it works with any piezo pickup and the shape control helps sqaush the quack of UST pickups.

Sound:
Actually, I have the AG-30 amp which includes this DI. If you check out the Ultrasound site, they describe the DI as an AG-30 without the amp and speaker. If you run K&K pickups the 1Meg Ohm input of this DI is a perfect fit.

Ease of Use:
Very easy and intuitive to use. The shape control takes some experimenting but overall it is simple to use.

Support:
I have emailed Ultrasound at least a dozen times and they are always responsive and detailed in their answers.

Overall:
Even though I have an AG-30, from which this circuit was taken, I am ordering the DI to have the tone control/shaping ability that fits in my guitar case. However, the AG-30 is a great deal. For $70 more than the DI, it has the DI plus an amp and speaker that work great in their own right and can serve as a stage monitor if you're connecting to a PA.