1Q84 is a long story, but I never felt the storyline was coming to a halt or becoming boring. The plot flows naturally, and every little part of the story carries meaning. Some people have said that too many questions are left unanswered, but I wouldn't agree with that. Rather, leaving some open ends might be a conscious strategy to leave a certain impression on the reader. The world of 1Q84 cannot be fully understood - but maybe that's a quality inherent to the fantastical world that 1Q84 is.
Murakami creates a rich world with detailed characters. Sometimes I felt the characters were a little too smart or too good at what they were doing, but that doesn't impact the work negatively. This story is not intended to be realistic, even though many elements of it certainly are real. At times I wondered if it was really necessary to describe the darker parts of the story so completely, almost ruthlessly. A decent amount of research must have been made in order to make this work come alive. Parts of this research, I guess, might not have been pleasant to carry out.
1Q84 is abundant with references to classical literature and music - maybe too much so. If you like learning about that kind of thing, however, it's a good thing. It may sound exaggerated, but I do think I learnt a lot from reading this work. It explores a variety of themes, and although the answers are rarely clear it helps one to gain a better perspective on many issues. As surrealistic as 1Q84 is, it treats real issues at length. Be it loneliness, revenge or belief.
As a reader, I haven't read much fiction lately, and that probably affects how I relate this work to other works.