I'd agree with everyone else - the maps are good, but they are very low resolution. I'd pay for higher resolution.
I'm also not crazy about some of the maps being on multiple pages, but that's a quibble.
Another quibble is that sometimes the map is a very small part of the page for no obvious reason, making it a big waste of ink.
Other than that though, it's a great collection and I'd love to see more of the same (with higher resolution!).