As a sociologist, I am always looking for a good platform for surveys. My experience goes back to the days of PHPSurveyor, now LimeSurvey and I even actively helped develop there.
There are certainly a lot of good survey tools out there, but most have unfortunately moved to subscription models by now and don't make sense for me since I only do surveys now and then and then mostly as part of funded public projects that don't cover subscription licenses.
So far, Fynzo offers everything I need for my surveys and especially an SPSS export.
What I would like to see for quick analysis, and is only offered by a few tools, is the ability to make crosstabs directly in the online backend.
All in all: A pearl among the AppSumo tools and certainly a good investment for the future!