20 lb. copy paper is nowhere near as thick sturdy and substantial as it was some years ago. Hammermill paper made by International Paper is terrible these days--comes out of the printer wrinkled like it's absorbed tons of humidity. International Paper which I think makes the Staples house brands seems to do a little bit better with the Staples Multipurpose paper. It's still thinner and flimsier than paper used to be -- however even though it sometimes curls/wrinkles on the sides overall it is much much better than Hammermill. I gave it an average rating because -- compared to the paper of years ago -- that's all it is: average.