Has anyone used this book? What do you think of it? Thanks!

My first teachers used Beyer books, but I'm not sure if those are Op. 101.

Beyer has nice melodies, but his writing doesn't have the variety and high-interest music of the more modern piano methods, such as Hal Leonard or Piano Adventures.

In China, almost every beginner is still using it.

Same here. Every child and every adult (who wants to follow the classical route) start with it.

Sorry, I'm not a teacher and can't give you any professional opinion about it.

PS: It was my first piano book I enjoyed it, and foud that introduces scales very metodically. Only my point of view, of course.

That makes Beyer's method the most popular in the world! In U.S., I guess Faber has the honor.

Not bad. I was started on it at ~9 years as soon after doing well Thompson's 1955 Easiest Piano Course vol.1. A sharp jump up in difficulty ! It was the nicest sounding of those 19th century methods used by the old lady (the others being Czerny, Schmitt, and ugh, Pischna). Quite melodic, reminiscent of Mozart. Two exercises from it are copied in Faber too ;-) Good as background for Mozart etc., little relevant for today's recreation (depends on receiver's tastes...).

But... difficulty jumps up *fast* compared to modern user-friendly methods (say, level 2 to 5 or up), and it's much less directing and self-teaching - i.e. it *requires* a good teacher to fill all the gaps.