First I have to say that this is the best viral theme on the market at this moment (after we tried some others). A lot of functionality included, even more that we needed... Very flexible, working with a lot of different additional plugins that we needed (caching, lazy image load, author slug...).
Second, and most important, is that customer support is truly professional. Response time is almost immediate, very agile and very responsible with understanding of importances in running business, and with specific assistance by programmers on site.
Third, this guys and girls are working on this project all the time, constantly updating and fixing things!
I would certainly recommend this theme and PX Lab for cooperation to anyone.