I bought this book to have access to the Office of Readings (also called Matins) as I was already in possession of Daily Prayer (which contains all the other hours). It's the thickest volume of the three and quite weighty. The US version, split into 4 volumes, is perhaps more portable - but their bible translation is poor. (Yes, even worse than the Jerusalem Bible!)
For those already familiar with the other parts of the Office, this is the next step up. Giving access to a greater quantity of scripture and, particularly, writings of the Saints and other selections. It can serve as a springboard to further study, for those who are interested.
Delivery was acceptably efficient.