My daughter's currently using the inset 30s for her ping which are perfect and I have no complaints really, but after reading someone else's post about contact detach in kindergarten, I started to think that a steel needle might be smarter since they can't kink like the flexible cannula. My worry is that the cannula might makes it way out and just be sitting on top of her body inside the plastic window and no one will know until she goes to the nurse to be tested. I'm going to call animas today to ask for a sample so that I can actually wear it to see how it feels. My daughter would primarily be wearing it on her upper butt area, it's where she has the most fat on her body. If your child uses the contact detach, what length do they need? I don't want my daughter to feel it so I was going to ask for the 6mm which I believe is the shortest they offer. (She's tiny and skinny) Also, where do they wear it "the most" since kids seem to have their favorite spots for the insertion lol If we decide to do this for school, we plan on using both unless one proves to be far superior to the other.