I have no problem with developers charging for their extensions, but please provide a support platform as part of this cost.
This is an ok extension, with several bugs so be prepared to be searching a lot for answers!
Before purchasing, I did have a couple of questions, emailed them to the developers and they came back straight away with answers.
This customer asked for a custom feature to be added that was not a part of the core functionality. We told the client that his request would require custom coding to be done and that we could offer a quote to add this functionality and he thought that customizations are free but we explained that customizations were an additional service.
Only criticism would be how to add componentheading and contentheading rather than just h1,h2,h3 etc
You can add h1,.componentheading or .contentheading for example, as the CSS Selector. You can add any CSS definition in the CSS Selector field like: #header a.slogan as another example.