I used one sample and don't think I did it the right way. Okay, my son was going to a day swim park here in Atlanta. So I had one sample of this IV3000 and had heard that they make the infusion set site stick stronger since he is going to be in the pool the whole day practically. Well, he had the site in already, so I took the IV3003 and cut a small "donut hole" in the middle of it and then put in on top of the inset site with the site in the center and the IV3000 as a "ring around it." But I think in reality the true way to use it is under the site...so you slap on the entire IV3000 clear plastic thingie...and then pop the site into it??? Well the way we did it, it did help the site stay in the whole time at the water park and my son really liked it! I ordered a box now to try, but was wondering if any of you have experience using it and which way it is truely the best way to do this. Thanks!