Disliked it overall. The mixes are fantastic - all in the demo are mashups, though, so hopefully you're a fan of that. By mashup, I mean two completely different songs (Hollaback Girl vs Give It To Me Baby, etc)
The fader on the mixer is terrible. Sad thing is, a decent replacement fader for a real DJ mixer is only like $30 retail, so it's not like this was an expensive component for the entire thing (game is $119, minus the cost of the "disc" the unit should have been $60).
The record component is better than the mixer component. Feels sturdy and has a decent grip. Spins real smooth.
The game itself is REAL basic. The three buttons are pressed in time for "effects" or "samples" to be played over the tracks. The three bars represent the fader position, if one side or the other moves, you slam the fader over to that side. If there's a box with a squiggly, that means to hold the button and "scratch" with the record.
I do like the rewind feature. If you get far enough, it says "Rewind Ready" and if you screw up a hard section, you can just reverse the record and it rewinds the track and lets you try again. I'm not sure if you can simply use this for bonus points or if it rewinds your score, too.
"Euphoria" is the bonus score mode that you activate after a number of perfects (button presses, fader slams).
The thing is, this is coming from a guy who can make these mixes live, "for reals". So for me, it's not as intriguing as playing drums or playing a Pearl Jam solo on a plastic guitar. It's also pretty much solo (I don't count the guitar add on, that's dumb) which takes away the party game bonus that Rock Band/GHWT have.
To me, it's just not worth $120. But then again, I have thousands of dollars of DJ equipment, so it's a bit like the guys who say "play a real guitar". But DJ'ing is nowhere near as difficult as band instruments.