I like that it has many different features which can be added easily by editing just one of them in configuration files (for example when you click print screen).
Sometimes we need some tools for our daily work as developer or manager but sometimes they are too bulky so simple things such user interface becomes very complicated if not hard to use at all because this thing contains lots of buttons with text and other stuffs. Also there's no way to save configurations without losing something important from previous version. Useful software especially now since internet connection problems makes us waste time while waiting before taking screenshot during web debugging sessions etc.