✔ 最佳答案
Not trustworthy! A friend of mine bought a Yamaha from them last year at a price of around HK$15,000. The sound quality of that piano deteriorated significantly after 6 months. As advised by some piano technicians, this piano is non-repairable.
My friend told me that this shop has provide a guarantee that they will buy back the piano within 3 years of purchase at half price. But considering the transportation and negotiation costs, I strongly suggest you get a new one.