I did the survey 5 times, so I hope that helps. Just kidding

, I only filled it out once.
BTW, if this is for a school project, your grammar on a couple questions could use a proof reader.
"Which e-reader according to offers good battery life?"
"Would you replace your e-reader for Tablet PC?"
Also the questions at the end are Yes/No questions but are labeled, "1 is Low and 5 is High."
Anyway, good luck with your project.