I bought two products. the services and products are very good.

I would recommend this for the DJ who's looking to convert from Vinyl/CD to digital format tracks or for someone just starting out. Think of this unit as a base-model Toyota with some very nice extra perks. I was pleasantly surprised that it came with some on-board sound effects and available samples (and the ability to record additional ones - but that's all software-driven).
There is no sound card built into this unit, so you're going to have to use it with a laptop's soundcard (or external sound card)...basically, it is an extension of the keyboard, but for music/DJs.
I used it at a gig without any problems. Has a good 'weight' to it and doesn't feel flimsy. Get a neoprene sleeve big enough for hold the unit (look around, it's out there) and keep dust/dirt off of it when not being used.
The drawbacks: no soundcard/visual display without a laptop...no (direct) way to cue a track while one is playing, but since I use it with a separate mixer, I got some additional cables to split the signal (coming out of the laptop) to 2 channels, but it was still a bit confusing. Good value for the money.

Numark product is amazing.