The layout of the website itself is rather minimal, and navigation is a breeze. As for user-friendliness, creating quizzes is easy and straight-forward. You can also import a quiz in one of two ways: from a shared quiz or from an Excel file. The latter requires you to download one or both of their templates (depending on your version of Excel) and enter the information that way.
There are two free smartphone apps: Socrative Teacher and Socrative Student. They offer the same functions that the website does. Socrative 2.0 is in development. It brings a new way of navigating the site, but right now it seems that there are some bugs that need fixing. I wouldn't try it out just yet, as it appears you need to create a new account to use it (how does that make sense?).
The survey I gave includes questions like telephone numbers, email addresses, a written agreement to the syllabus, if they have internet access at home, and identifying the type of learner they are among other things. It took about 5-10 minutes for everyone to take it, and when they were done I was able to instantly download all of the student data as an Excel file for super easy access!
If anyone is interested in checking out or using this awesome tool I have shared my student survey publicly. You can find it by using this number: SOC-3459213