I am curious about Ryoji Matsuoka classical guitars, particularly the M30 model. Is this make intended for beginners, intermediate players, or professionals? Are there any known unique qualities or shortcomings of these guitars?
A Ryoji Matsuoka of course, for intermediate to advanced users. They're known to be finest handcrafted classical guitar in Japan (also Yamaha, Kodaira, Aranjuez, Asturias, Shunpei Nishino and more). Matsuoka himself produce some guitars in 70-80s in a small workshop (which he doesn't build the guitar alone).