I thing this is the keyboard have the original sound effects of musical instruments when compared to Yamaha, korg ,... keyboards. I like natural sounds in this keyboard. and it has the some awesome rhythms also for examble :Indian pop, hard rock, techno beats, I love it. But the one thing is it not have the demo songs at least 15 to 20, it only have 5 this is the little drawback and some it not have the sustain button which is very useful for stage performers. But it is good one and the very good one for all piano lovers..