Feature:
Lacks a 4-band EQ, which would make this mixer the best in class. With its 3-band EQ, the Xone 92 gives slightly more control to DJs looking for it. Otherwise, the d.4pro offers all of the features you'd expect from a top-end DJ mixer, along with FireWire inputs for computer DJs and digital recording.

Quality:
It's a Mackie - as always, it's built like a battle tank and I'm confident this mixer will last for many years.

Value:
Very good value for the money - the only mixer even close to the same quality in this price range is the Rane Empath. And the Mackie d.4pro has more features. You really can't go wrong.

Desirability:
Lots of blue LEDs, looks great on a DJ table!

Sound:
C'mon... it's a Mackie! Of course it sounds good! Blows any Pioneer DJ mixer out of the water and is on par with the Allen and Heath Xone 92, in my mind the only other mixer in its class. Sounds great on a Mackie Fusion sound system, and also sounds great with my lower-end Mackie system (four SWA1801s, two SA1232s and a pair of SRM450s).

Ease of Use:
As a DJ mixer, this is very easy to use. The contactless crossfader is smooth as butter, and the controls are very easy to navigate (particularly the nicely placed filters). However, the FireWire features are new, and this technology still has rough edges.

Support:
They take forever to reply to email and still haven't shipped a replacement for the defective FireWire cable I requested over 2 months ago.

Overall:
While no mixer is perfect, the Mackie d.4pro measures up very well to the competition, and is priced aggressively to match. I wouldn't hesitate to recommend it and after having used it for a few months, it's hard to imagine going back to another mixer.