Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mostly Unsatisfied

My main complaint about books edited by denes agay is that they do not lay flat. I sure wish music publishers would publish music book s with comb binding or something similar so the books will open and stay open so you're not constantly fiddling with them and cussing when they close on you while you are playing the music. Is this too much to ask for? And why doesn't Amazon inform us of the type of binding in the details of the book?