I'm using this to send proposals to clients for work to be performed. I can outline standard work and processes, easily customize that outline, and have a proposal done in an hour or less instead of, well, days.
I'm also using this to send engagement letters to clients. It's *almost* fully automated, and, I'm hoping, will result in less chasing of clients for a thing that they don't value but I *have* to have to get started. Putting it into this kind of a process makes it a non-thing on their end and, hopefully, more likely to sign.
I'm also using this to get deposits on work to be performed. Review collected by and hosted on G2.com.