Summary: I had these headphones for a while now and use it regularly when running. I really do not understand what makes them special and justifies the price - they are not particularly comfortable - next time I would go for something cheaper which would do the job as well.
Summary: This is a combined review of two recently purchased headphones. The same review is posted under each product. The brief background is that I wanted some good headphones for running/walking and wasn't sure from the mixed reviews which type of headphone to buy.. so I got two types to compare.
Summary: Arrived quickly, excellent sound. The only problem was because they have the volume/control built in they didn't work on any of my mp3 players. They only worked when plugged into my laptop. Sent back and got a refund.
Summary: When my cheap Sony earphones packed up (as they always do after a few months) I thought I'd try something a bit more upmarket. The sound quality of these headphones was very good, I was able to hear detail I simply hadn't been aware of before. But they really were quite painful in my ear after wearing them even for a short time (I notice now that several reviewers have commented on this). Personally I think the ear buds are the wrong shape for a comfortable fit.
Summary: I bought these mainly for the gym and when running but as I've lost my other in-ear headphones I've also been using these a bit during commutes and they work well for both purposes. The sound is pretty decent for the price and if you're using these for exercise then you're presumably not going to be giving your full attention to the music anyway.
Summary: Unlike some, I haven't tried many different headphones for running, etc..., but the two pairs I've had (both from Sennheiser), have been equally comfortable, secure and the audio quality has been easily good enough. The previous ones were the 'round the back of the neck type, which I found to sit well, but tended to leak a bit too much sound (although they allowed great spacial awareness for street running and cycling).
Summary: I was looking for a pair of headphones that would never fall off.. as I do a lot of running. This over the head design is the best I know of for staying put. Mine were great, but after 1 year or so the left ear phone cut out, the wire must have torn, just below the ear phone, as that is the location at which you fiddle with the wire and the sound comes and goes. I tried a DIY fixing job, but it is so fiddly I have chucked them out.
Summary: These are the best gym headphones I've had. In ear ones are useless, if they don't fall out you're not trying hard enough. Phones with a neckband that goes behind your head are uncomfortable unless you keep your head down. These sit snuggly on top of your head and provide a good seal between the speakers and your ears. The sound is pretty good too, the bass is evident but doesn't overwhelm everything else. They are perfect for excercise.