You can set nearly anything your mind will come up with. Im impressed how much functionality is hidden under the hood of this extension.
Ease of use
I hate when I install an extension and then I have no idea how to start using it. Here was everything so clear that I was.. again..impressed
I had some questions for feature request and Pavel was so friendly, he implemented it directly and provided update next day.
I didn't needed it really, but there is available documentation even with live demo site
Value for money
I knew what I was buying as I tried everything on live demo site before. Worthed it.