There's a giant library of survey templates, so be sure to check out QuestionPro's online survey software. How easily can a template be used as a baseline and then customized to fit your specific needs? What about flexibility? If you want to create a questionnaire completely from scratch, what is that experience? Most online survey tools have a number of available question types, but what about logic such as branching and scoring?
QuestionPro's powerful online survey tool excels at all of this.