8 octaves.
Keyboard tiring if you are not trained pianist.
64 sounds (Acts piano, Rhodes, Wurly, Organ, pad, synth, string, clavinet, drums)

UTILIZATION

Touch tiring for me that is not trained pianist, but it allowed me to significantly improve my game
C carry quite heavy but the price of the solid. Good quality workmanship.
Trs prevent me using simple keyboard as Matra.
Manual clear and sufficient

SOUNDS

Ac. Piano. : Trs good solo (the 3-band allows quliseur rglages purposes) but more difficult to incorporate a mix ...
Ep: Rhodes and wurly good even if the trs trs heavy touch makes the game difficult compared with the original instrument. EP style sounds and D50 or DX7 Yamaha CP80 of good quality.
Organs: Varis and pretty good overall.
Pad: Roland c. Well
String: usable and fairly treated
Brass: shit
synth lead: none
Bass: good acoustic bass. The rest who cares c not the vocation of the piano
Drums: excellent

OVERALL OPINION

It seems that the new MODELS (Yamaha RD700 or P80) are better but I love my piano.
He had to get used to the touch trs heavy but there is got.
Pay 1550 Euros 4 years ago new. Good quality for money.
If I had to change it I would choose a slightly lighter MODEL design and style Rd170 p80 or Yamaha but I do not regret my investment.