I like that it is very intuitive for new users as well as more experienced users - all aspects of work training are covered! It's not too difficult to use when looking at different types of documents.
The only thing i dislike about starling is that there isn't an option to include attachments to our pdf files which we send out via mail or email. This would be great if this could be included so that people have access to them straightaway without needing someone else to check their emails first before they open the attachment. It has made life easier by providing many templates available within my organisation (so far) such as safety documentation, procedure manuals etc.