Actually, it feels good. Using a low pressure really makes a difference. I don't have a gauge so I have to go by feel. I brought this up at a pumper forum, and one of the guys there said to pump it just until it is hard, but still wiggly in the cylinder, not rock hard. He said there should be no discomfort at all. I tried it and found it worked just fine. I got pumped really huge and I am still slightly pumped up this morning, 8 hours later. It eliminated the discoloration I had been getting and also I am horny as a fucking goat today cause the dick is just so sensitive! The only con to getting that big is my c-scar is a little stingy. I guess it is getting stretched out, which is actually a pro consider my two goals with pumping: FR and a bigger dick.