Everyone should have this book; I have been in many churches and know a lot of hymns, but this book is filled with hymns that I have not heard of... just for that, it is great. I'm not sure how they did it, but the songs are clear and very readable (excellent font? good kerning?)
The songs are packed with information that is rare in a hymnal: some have musical notation (p, mf, etc). Some have a brief history of the song. There are more verses to the songs than I've ever seen in a hymnal.
All of these songs are older songs; I'm not very impressed with modern songs; I think the latest song might be around 1940; most of them are earlier than 1900. The old songs were far more substantive than the new songs.
It's almost a reference work more than a hymnal, and I'm thankful that I heard about this book and that it is on the piano at home.
Having said all of that, I'm not sure that this book would make a good church hymnal: in the first place, with 980 songs, it is HEAVY. Secondly, having a LOT of verses means that the song leader will need to do additional work in figuring out verses to leave out.