The DJ2 is mainly targeted at users of the "Traktor" DJ software by Native Instruments. For that reason, it is not freely configurable but has some hardwired functions and sends fixed midi-values.
Anyway, it is still possible to use this controller with other (VJ)softwares, because in many softwares you can root incoming midi-signals freely to software controls.

Example:

The MPD-16 Akai Pad is a very nice 16 pads midi controller. It can be used via usb or midi. Powersupply is provided through the usb cable or through a standard 9V external power supply (which unfortunatly doesn't come with the MPD-16).The MPD-16 has 16 nice caoutchouc pad. The pads can be used in different ways.
-when the BANK function is activate, the controller is switching from pad 1-16 to 17-32
-when the FULL LEVEL function is activated, each pad send the maximum velocity when pressed

huuum.. where should i start..well just bought it a couple days ago, so this review will be updated as i have more time and experience with it.

About the aesthetic side of it.. WOW! when u connect it seems like a xmas tree!(how appropriate for th season!)

it really as a nice touch and feel, some elements in alluminium really help to forget the plastic side of controllers.

Bought a brand-new Evolution UC-33 controller last week...
I paid US$225 for it. I printed out the ad for it from audiomidi.com and took that to Guitar Center. They let me have it for audiomidi's price Tested it out with Ableton Live and Propellerhead's Reason on 800MHz WinXP machine with MAudio 2496 card.