About Yamaha U3, I can not, given its price, whether to recommend it to anyone studying the piano so diligently and intensively.
the instrument is robust, and for optimum benefit from the richness of its sonic possibilities, like all pianos, it must be given 4 times per year (with each change of season) during the 2 years following the purchase of this new instrument.
As a result, do give two times a year, in spring, after turning off the heat, and autumn, 2 or 3 weeks after rekindled.
As with any piano, move it, as far as possible to 1 m 50 for all heat sources, including exposure to sunlight.
Optimum temperature between 18 and 22 °
Humidity averages 60%

Yamaha U3, very pleasant to give, very robust, ideal for music academy students a good standard, excellent value for money.
I will cite the example of my first student that I learned piano at age 8, he studied piano at the music academy, and was admitted to the Royal Conservatory of Brussels.
His Yamaha U3 remained loyal throughout his studies, which have made him a virtuoso he is today!

Thank you for your attention and see you soon.

Alain de Rhode,
Piano Tuner & Technician.