It looks great and it works great, but it lacks two features. Once you've highlighted some text you cannot un-highlight said text. The only way to do that is to remove all highlights and manually highlight everything else again, which is rather tedious. The other feature is a save feature. I want to keep highlights for future reference. Of course not everyone needs this, so it would be nice if this feature could be turned on or off. But it would be a great feature to have.