Anyone here using an M-Audio Keystation 88es in their set up? If so.., care to share any thoughts on the unit., pros/cons..?

I know we're arranger players.., but controllers are owned by quite a few here too ;-)
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.