I bough my the clavinova 635 digital piano for my daughter. After researching several other pianos I decided this was the one for her. It's amazing . It sounds amazing . People down the street can here her playing the quality and sound from the technology is beautiful. I am so pleased with this piano. I love that there are several colors to choose from. We choose black ebony . She will have this forever, also it came with a five year warranty .