I have found this dictionary to be terrific. Spelling, definitions, etymology, usage, date of origin -- all very valuable tools. The alphabetizing is a major plus. It used to be really difficult to find words before they used this system for listing each word and its subsequent definition.
I have one minor criticism. They don't have any of the words I submitted for inclusion in this new edition. While admittedly, "paahk" is not yet universally considered part of standard written English, I think it is still spoken enough -- at least here in Boston to warrant inclusion. Similarly, I was disappointed to note the absence of "fugetaboutit". They have other slang terms and I thought this was a major omission.
Even so, all in all, yeoman work.

This is a great Dictionary just exactly what I needed soo buy this

Contains many new words, even new internet and computer definitions, however, this book has no perks (as in extras).

Far and away the very best of the smaller dictionaries for etymologies (word origins). This is what I use in the high school Word Power course that I teach based on Latin and Greek roots.

I write historicals, and needed to look up the date of origin of a word. I had no idea that the dictionary I'd been using didn't include that information, so I immediately looked for one that did. After all, shouldn't every author own a comprehensive dictionary? My Merriam-Webster's Collegiate Dictionary-11th Edition arrived yesterday, and I love it! It lists the date of origin of each word--a must-have feature if you're writing historical, or judging another's writing, as I've also done in the past. By the way, the word "bubbly" came into use in 1599, so I'm good to go with it in the early 1800s. :-)