@steve6, as real dictionaries go, not especially. When I am serious I use the hard-copy OED, big Webster’s, American Heritage, and others. But as online dictionaries go, I like it well enough, and I am used to its convenience. I consult it often, even though my vocabulary is fairly reliable.
The world is your encyclopedia when you have Google, as long as you can discriminate between good-quality information and B.S.