What sort of pre-made survey templates do they have to choose from? Is there a huge library of over 100 different questionnaires to choose from for editing and customization? If you already have questions that you'd like to implement, can you easily upload them into the editor? Or perhaps you'd like to start from a blank template. Can you choose from a variety of question types, implement scoring, advanced logic and branching? In addition, do you have access to your survey's CSS for modifications?
QuestionPro gives you access to all of these features, plus many more.