Feature:
EFFECTS EFFECTS EFFECTS! When I started DJying I relied heavily on effect, the two processors they throw in are awesome. Lots to play with and many parameters to tweak to customize our sound. Kill switches are awesome! Havent used the sampler too much. I gave this an eight mainly because i felt they could have done just a tad better on the quality of the effects, the pitcher mainly.

Quality:
This is my biggest gripe but you get what you pay for. The system feels cheap, the knobs are plastic, the faders don't have alot of resistance so to me it didnt feel solid like a PIO. Never the less that shouldnt stray you away from this thing, it is a beast. The layout is intuitive and well thought out. I actually had a DELL desktop fall on top of the mixer due to car whiplash and it survived only with a bent pan knob, other than that everything else was fine, can't say the same for my numark cd players. I have been beating this thing up for a year and I play with it at least everyday for 1 or more hours so I have but alot of stress on this machine, when things started acting wonky (midi stopped working, eq kills were not as responsive) support was simple (please read below)

Value:
I would recommend this product to any dj at any skill level. it has all the features you can ever want and then some. 400 bucks for an awesome mixer, awesome support and an awesome experience. Even if you already own one and need a back up consider this thing.

Desirability:
Not extremely sexy in my opinion but the layout is clean the flashing buttons are perdy and all black makes it look professional. I use this with a macbook and they go hand in hand looks wise.

Sound:
I do not own studio monitors and as an MP3 DJ sound quality isnt on the top of my list. No sound creeping into the next channel as I was warned about from others. 24khz digital sound quiality so its gotta sound good. PS: not an severe audiophile but wont accept anything under 320 kbps for mp3.

Ease of Use:
This was my first DJ mixer ever, EVER! Got it last year for xmas and haven't stopped using it since. READ YOUR MANUAL! This is the biggest thing, you opbvilously can figure out wat the faders and eq knobs do because its common sense, defiantly an awesome mixer to grow with, you learn something new everyday.

Support:
IF I CAN GIVE THESE POEPLE AN 11 I WOULD! Behringer support was easy, simple, and freindly, and the folks at zzounds.com were awesome too. zzounds allows you to download a copy of your receipt in pdf format. when you go to your support center at behringer.com you can fill out the form attach the pdf and ship it out when you get your RA number. The prossess was simple. On top of that I had a gig coming up, I informed behringer that i needed it for my gig on the fifth, they got it to me by the 3rd, three day turn around once my product made it to the warehouse.

Overall:
if i had the money I would obviously buy something with alot more knobs and faders like an Allen & Heath, but this thing i would defianlty buy another one in a heart beat.