I was given these while my son was in the NICU and I was having to pump constantly to build a supply. They were BY FAR the most relieving thing I found. I tried the Gerber, Medela and Platex gel pads and they just didn't cut it. The great thing about the Ameda hydrogels is that you can keep using them over and over and over. I used the first set for about a week and just kept them covered in the fridge when not in use.
I bought a couple more packs of these when my son was teething to relieve my discomfort from the process and would (and do) highly highly recommend them to new moms and moms having discomfort. They aren't messy like the platex ones and aren't sticky like the Gerber and Medela ones and they last at least 4-5 times longer than the others.