I found the free version (Mad4Joomla) and was pleased. Then I purchased Proforms and was flashed. There is a big difference between both versions. Mad4Joomla is easy but Proforms is much easier to use and has many additional functions.
I can recommend to test Mad4Joomla and if you like it to buy Proforms, it is worth any penny.
Finally the support: I had a small problem, wrote a ticket and got an answer within 10 minutes.