If you use strong and complex passwords that contain special characters (which you should), it can some times be challenging from an automation perspective on how to properly escape these characters, which can also depend on the scripting or programming language that you are using.
Today I learned about a nice little enhancement in OVFTool 4.4 or later, which makes it easy to handle complex passwords containing special characters by supporting URL encoding for these characters. This is also great for those writing automation scripts and not having to input the password interactively but can now be added to OVFTool command-line string.