I am using an older version of Compojoom Comment and was doing an upgrade to a slightly newer version. The tool works great but I wanted a few of the newer bells and whistles. I ran into several difficulties - getting pagination sorted out and problems with Compojoom causing my page to become far too wide (turns out this was due to changes I had made to some of my Joomla files).
During the upgrade (and the problems) Daniel worked with me to sort everything out. I was quite concerned that like many extensions I was going to be on my own but that was not the case. I ran into some tough issues but I have them solved. The product is very good and the support is excellent.