I'm living in mile-high Colorado, USA - It's very low humidity, which limits me to playing my bamboo inside. The Yuu, for me, is a perfect practice instrument for when I'm in low humidity, direct sunlight, etc. So I can play outside or in any weather conditions.
The sound is good. It's easy to play. Note that it is on the heavier side. Meri notes are not as resonant through the plastic, but it still works.
Lastly, I put a sticker on it! I would never do that to the bamboo. It's great! :)