The founders/employees of QuestionPro maintain an interesting company blog that, in addition to describing specific features of their service, also includes a variety of more useful, general information that anyone can theoretically use with any survey service. It’s always nice to see a company that isn’t just focused on getting more clients but is also willing to add to the general knowledge available online.
Interesting posts include:

They may have an interesting blog, but Questionpro customer service is useless. I had continuous trouble with my survey respondents being constantly dropped off the surveys in the middle of their answers. Tried to have the questionpro staff look into this issue but despite my multiple trials to communicate with them, they never followed up. Also, they do not allow downgrading your service to a cheaper version once you upgrade to a more expensive service. I did not want to continue paying $100 per month for a service that did not work. Instead of allowing me to keep my surveys active at the cheaper Web Professional rate ($15 per month) they made me cancel my account. I won’t miss their “service”.
I am using QuestionPro to send a customer satisfaction survey to a select group of our partners. The Tool is quirky and it not intuitive and full of BUGS! Many of the advertised functions don’t actually work such as the security feature to lock the survey with a unique password for each participant or with a global password. Also after you enter a survey with skip logic and then copy that survey, the tool doesn’t reliably copy the survey; many of the questions went into error and the skip logic had to be reprogrammed. The staff at QuestionPro said that is a known bug and there was nothing that could be done about it. I don’t like the fact that you cannot customize the reminder email. You cannot also put the logo on just the first page of the survey. Additionally QuestionPro has a feature to allow a survey participant to save their survey and finish it later; however if you have questions with skip logic; the save & continue function does not work reliably; when the customer tries to pick up where he/she left off, the questions are presented but none of the possible answers are visible so the customer cannot answer the question. If that question is mandatory, then the customer has to restart the survey all over all. When I asked the online chat support person for assistance, they once again said that this is a known bug.
I do not recommend this tool to anyone.
I prefer http://www.snapsurveys.com Very intuitive software