A student at the University of Mainz in Germany, Almana Mukabenova, is doing some research on the usability of the translation tool Virtaal. She prepared a questionnaire for the purposes of her master's thesis:
https://www.surveymonkey.com/s/NV9YFJR
I'm very interested to see what comes out of this, and want to encourage all users of Virtaal (past and present, serious and casual) to take part if they can.