The main piano sound is really beautiful: sweet, rich, natural and resonant. Lots of options (basic setting + virtual technician) to tweak it to your taste. Not many other sounds (don't expect trumpets, guitars, weird stuff etc, it's basically just keyboard instruments and strings), but generally of good quality. Rythms and automatic accompaniments, though not so many, are a fun feature that a lot of digital pianos don't have.
The onboard speakers are powerful but on the bassy side and lack some clarity for my taste, so I had to increase the brightness and cut the bass to get where I like it more. Fortunately, you can save all your settings and tweaking in a registration bank and recall them with the switch of a button. Also, the action is a bit hard especially in the lower half and the keys are a bit noisy.