Also known as the Authorized Version, sometimes AV 1611. This was an outstanding translation for its time, perhaps the greatest single accomplishment in Bible translation. It's language is now out of date, and it also has not benefitted from the new manuscript discoveries in the centuries since it was translated. Besides its review page, check the Energion Publications pamphlet What About the KJV?
Here is a video looking at the strengths and weakness of the KJV, titled Why I Hate the KJV. I don't, really. Watch and see: