I have used the free version for more than a year. A new project needed a more robust solution so I purchased Plus. There is everything to like here. It all works perfectly and is very well thought out. You can create very complex contact forms, and as many as you want. Whenever I couldn't figure out something I read the documentation again and it came clear. Well written, thorough documentation? What a concept for a Joomla extension. Kudos to the developers.