With all the time we spend moving and editing via FTP, this is a really easygoing way to do the work.
It works exactly like a mounted drive on explorer. (I know Microsoft offers or used to offer similar functionality, but it was not nearly as seamless in my experience).
You can browse, edit files, almost forget it is not part of your local drive. Probably not great for bulk transfers, but it sure beats having to open a big application or typing into a cmd window every time I need to change a line of code. It is freeware and only a tiny little bit buggy. I love it and wanted to spread the word.