This mixer is quite good I must say. The addition of the "On Air" mode where the jog wheels on the CDJ-2ks turn red when the fader is up is genius. Also the sound quality of the reverb is phenomenal and it will go on for a VERY long time if you have it up at 100%. The noise is a great little effect as well especially when combined with the reverb
Worth every dime if you're a DJM-800 person you'll LOVE the 900.
P.S. The DJM-2000 seems like a waste of space to me, hope they don't get on a lot of riders.
Josh