I've been using Quilt Pro for a long time. I upgraded from version 4 to the current version 5. I fully expect them to release a new version soon because there hasn't been any updates for a while and they like to keep up with the Jones's (Electric Quilt).
I couldn't believe all the books and add-on stuff that was being marketed for EQ at the time and felt if it needed all the add-on stuff, I would rather have Quilt Pro. I've only had minor issues with it and all the issues have been fixed with free updates over the years. Their support is very good.
I don't know what EQ is capable of that QP is not. QP does what I want so I'm very happy with it.