-Multiple versions: Why settlee for one version when you can have them all? Well, not all. Versions like NIV, NKJV, and several others have legal issues that do not permit them to be online. Nonetheless, you can have others like ESV, KJV, and even non-English versions, and easily swap between them. It's very easily to install "Books".
-Commentary, Dictionary, and Other Books: Because it's actually a Bible "study" tool, you can also have a commentary like Matthew Henry's Commentary or Spurgeon's Morning and Evening, a dictionary like a Hebrew to English dictionary, and even Other Books like Pilgrim's Progress or Augustine's Confessions. There are panes for each different type, which can be hidden or shown.
-"Copy verses": You can customize a way to copy verses, like putting the reference before or after, adding verse numbers between every verse, etc.
-Search: Very very easy to search the entire Bible for specific words, in just a few seconds.
That's about it. It's a very nice looking program, and works fairly well. Also, Portable apps decided to make it Portable, so head on over there if you want to give it a spin without installing it, or if you just want to keep God on your flash disk all the time.