Calendly lacks real tech support

Customer support is 100% via email, which is ok, but very annoying. No matter how big the issue, it is 100% via email. This is true with the paid or the free version. They will ask the same scripted questions and send the same scripted "self-help" messages regardless of what you type. It is a good product, it is very helpful and will make your life easier. It, however, doesn't work great with Microsoft Office/Outlook. If you choose to use this service, unless you need the features that come with the paid version, I recommend getting the free version.