I like this book conceptually, unfortunately execution is less to be desired.
Compared to the original adventures, this compilation features much lower-resolution artwork than the individual adventures. This includes everything from Maps, to Character Portraits and even the Front Cover and Page borders. Additionally there are no bookmarks and several of the adventures have DM maps included but not the player maps.
If you buy the BUNDLE instead, you get all the adventures, better quality artwork and unmarked player versions of all the maps. Each adventure was updated with a page or two of extra content to connect them in the main book. However each of the individual PDFs was updated as well.
The adventures themselves are excellent and I reccomend them all. At the moment however I wouldn't reccomend this version, I would buy the bundle version instead. I spoke to C7 On Twitter and they opened up form for feedback and errata (see the discussions) however at this time the PDF has not been udpated.