I like the look and I like the frontend simplicity. That's a fiver. But for the rest...? Sorry, guys.
I use joomla because it's a tool to make nice sites without being a code wizard. I use it on an "IKEA level". That is, I'm not a carpenter who can or want to make my own furniture. Metaforically, you need to be both carpenter (html savvy), blacksmith (SQL savvy) and tailor (CSS savvy) to make this extension work at all.
It actually feels as if the whole point in using joomla - not needing to be code savvy - is totally evaded in this extension.
Joomla is a tool dependent on and created by other tools such as php, html, js and css. These tools work on a level below the complexity and ease of use of Joomla. Together they make something more complex and beautiful than themselves - Joomla. If I want to use Joomla as intended, I don't want to learn all the tools for making Joomla in the first place, in order to use it.
The first stumble block is creating a new database to actually do something. Pressing the usual New button to create a new database, you are asked to select the table you want to use from your MySQL database. There is no way to put in a new table as in ChronoForms or any of the other similar extensions. You have to create it through phpMyAdmin first, to be able to select it as New database, and that is sooo Not Joomla.
So, even though the looks are great in the demo, I cannot give you anything but a "very poor" rating, because as an average Joomla user, this extension is useless. If, on the other hand, this were a ful-fledged joomla extension, I would gladly pay the 50 euros to use the pro version, cause I somehow sense potential here.