Which survey software to use? I want to create a fairly long survey for my doctoral research. The target audience is teachers in the area. I have the option of using the software my institution provides (Qualtrics), Google Forms, SurveyMonkey, or perhaps something different. I'm leaning toward my university's software because the URL has my university's domain and might seem more trustworthy or legit than SurveyMonkey. Google Forms is pretty slick, though, too.

My one requirement is that I need to be able to branch based on answers.

What are some pros/cons of using one software over the other for academic work? Is it okay to do a survey with software not provided by my institution?

(PS--This is actually on behalf of my wife. :-) )
I would go with Qualtrics, for the reasons you cite. 

However, make sure that when you pull the data out you export the questions all the possible ways, especially the .qsf version. Otherwise, when you leave the institution, you'll have lost the survey (because you can't log in to get it). This is especially important if you, or anyone else, wants to use the survey again.

Since my institution uses surveymonkey, and I find the idea of asking people to go to a monkey site abhorrent, I will probably install Limesurvey, but my proclivity to do things myself the hardest way possible is a personal problem.