Now that school is out for most people...Has anyone used the iPads in a 4:1, 2:1, or 1:1 setting? How did it go? Did you create any survey/assessment to evaluate the user's experience?

I see a lot of posts about the iPads, but I am still looking for more information on anyone using them in the classroom for a period of time? How did it go? What grade levels did you use them with? Did you do any Pre/Post survey or assessment to see if there was any impact on attendance, discipline, student engagement and even grades.