I didn't like the feeling of my ear canals being clogged by something. Some say their customs "disappear" into their ears, but this just isn't the case for me. The fit was not an issue; I had a good seal and zero pain. It's just a sensation that I can't ignore or forget about when I'm listening to music. It reminds me of scuba diving - as you descend, you feel more pressure on your ear drums and you have to equalize by pinching your nose and blowing in order to feel no discomfort. Fortunately, when scuba diving, I can completely forget about that feeling when I start looking around at the fish and coral - if you're in a good spot, scuba diving is like Avatar on acid. Ahhhh, scuba diving.....at any rate, I may have sensitive ears, but I can't imagine this not being a distraction for me in the future which is why I'm going to stick with universals. I'm pretty jealous of those who forget they are wearing customs to be honest...they do sound fantastic with great isolation. I'd say Cosmic Ears pricing lowers your risk and you should be able to sell them and get some of your money back if you don't feel comfortable with customs like me.