First off, the pages don't stay in and I'd prefer if they did. I was very clear with my daughter not to tear them out, but now she has and the size of the thing is making it difficult to find a folder to put them in now.
This product has the same problem a lot of Melissa and Doug products have: storage. The best toys are toys that can be picked up and self-contained. Particularly when little pieces are involved. With this set there are stickers everywhere and pages all over the place and we have to gather them up into a messy pile and put the stickers in a sandwich bag. It's not ideal.
Other companies make this product with pages that stay in, so I highly recommend you shop around. Pages-all-over-the-place might be okay for one-time-use, but this is marketed as a REUSABLE sticker pad.