On the other side, I had some doubts and questions (Not Problems, Extension is perfect and free from bugs), I posted in the forum and you can expect a reply in less than 12 hours and that is due to time zone. When the developer is online, I was able to get instant replies.
The developer is very friendly, helpful and patient. I appreciate his persistence and patience in sorting out the doubts.
I urge everyone to not just buy the extension, but also give a try of their services. "A taste of droplet of water shows off the taste of entire water". Same way, My try of their plugin and customer support makes me strongly feel that their paid services are also the same or my better!