I did not like the sound yamaha, often in low metal medium, I tried the U1, but the Yus5 has nothing in common with except the touch (which are both excellent) the stamp is This warm and rich closer to the Steinway (Submitted in the store) especially in the medium aigu.On benefited from a direct sound from the front panel by pulling it towards you, (this opens the front of the strings) which gives an upright piano whose timbre is really close to horizontal counterpart. . .
Excellent, and I'm really not a fan of Yamaha
Ps: I have the version "silent" it works without problems, but that is completely overtaken by the way "acoustic" on MODEL.