I like that this application integrates with our legal team software so we can send documents from one to another without having to copy/paste them over or print out each page separately (which was getting old). We use it mostly when sending files back and forth but also occasionally sign off as witnesses in court proceedings. It's easy enough to navigate through the interface which makes signing off pretty straight forward. There are no downsides at present however if there were any they would be minor since I don't see anyone else using it yet.