I have now run with these earphones about a month (~100 miles). They replaced my iPod earbuds.The good:1. Sound quality is excellent. There are times when I am running that I can hear parts of the music that I don't necessarily hear using my Bose at home in my living room. It provides excellent reproduction of the full range of sound.2. They don't fall out of your ears. Not once.3. You can wear a hat because the band goes around the back of your head, under the normal area for your hat.4. Another reviewer mentioned wind noise but I don't find this to be any different than my old ear buds.5. The little clip on the wire attaches to your jersey and prevents a lot of tugging on the wires.6. The neon green makes it easier to find them when they are thrown around the house.The less-than-good1. They are tight enough to cause some ear discomfort with long runs.