I love DocHub. Great for signatures, particularly when I need many opeople from one office to sign the same document. I also use it for outbound faxing, editing PDFs, combining PDFs, and filling out forms. It's a jack of all traits and worth every single penny.
I really don't have much. I pay for the unlimited faxing and full access and can add team members as needed. Occassionally a checkbox from a PDF form doesn't pull over and I have to add one manually- but it's seconds on the hours it saves me each month
I work from home. Dochub makes it possible for me to sign documents and send them back without having to print and then shred, to reach clients all across the nation, and to use one online version of a program instead of several.