You need a big book of magic items? This is a big book of magic items.
Are you going to need this many magic items in your campaign? You'll never know if you don't get it!
In all seriousness, it's a fantastic collection. I randomly spot checked 20 pages, choosing items to look at and I wasn't disappointed in any of the selections. Now I'm going over it with a fine toothed comb and I love it even more.