I previously used Merriam Webster's Collegiate Dictionary, Eleventh Edition religiously. A couple of weeks ago, they did not have a word that I was looking for. That's when I decided that it was time for a change.Oxford always had a good reputation for refrence books. I can see why. This book has many more listings. The only thing about this dictionary that I am disappointed with is that it does not have thumb tabs. I find those helpful to have in a dictionary.