It is very flexible and good value. It does take some time to understand how to use it, so if you do not understand what a Likert scale is don't grumble at the developers!
The appearance can be customised and now embedded in content items. There is also some integration with other components, which I am sure will be expanded upon.
When I have had issues the developers have nearly always responded very quickly.
If you are looking to create surveys this should be on your list.
It has an extensive feature set and unlike many Joomla components has a clearly laid out and comprehensive support site. The developers have already added improvements to it. At the moment we have only used some of the features and am looking forward to using it more extensively.
So far highly recommended.
The software has been updated since I purchased it only a few weeks ago and the developers incorporate improvements.
Very impressed so far.