I have the PSR-550, and it's not a bad board, but I agree with everyone here. If you got the funds, buy the PSR-2000.. It is a much better board. I would have bought one, but my funds would only allow me to get the 550...
Squeak
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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.