This was a great book for those looking to get their feet wet with MongoDB. PHP And MongoDB covered many more topics than many of the MongoDB books I have read recently and while I am not a PHP developer gave me a few more ways to leverage MongoDB in my day to day work.
I especially enjoyed the chapters on Geospatial functionality and the GridFS system. Both of these topics we handled throughly and are typically glossed over in other books.
The one place I felt this book was light was the operations and administration side of things. Nowadays, many developers are handling operations as well and I feel that those topics could be explored further in books like this.
All in all, I would recommend anyone in web development looking for somewhere to start with MongoDB pick up this book and give it a read.