I actually owned the first six volumes individually before purchasing this box set. As soon as I saw this set, I had to buy it. The box is really beautiful and perfect for storing these books. There is a difference of paper quality from the individual volumes, and each volume inside the box set is "Printed in Canada" whereas the individual volumes I own are "Printed in the United States." The paper quality feels cheaper and more flimsy, so they do have the potential to crease more readily than the individually purchased volumes.
However, all the contents are the same with colored pages in the first few pages, so if you are not picky about paper and the slight difference in printing as an effect of the paper quality, then it is really a nice set with stickers and a lovely storage box. Also, the only other problem I found is the first and last volumes of this set (#1 and #6) have a little dent on the corner cover, probably from the manufacturer inserting the books in the box, and the fact that the paper quality is thinner.