Although the earphones that came with my iPod nano were very impressive in terms of sound quality, they were not up to the rigours of regular commuting. I needed to get some new earphones and I decided on the Sennheiser `phones for two reasons: Sennheiser is a name that I am familiar with having used their headphones with my hi-fi for several years, and I was attracted to the "extremely rugged earphones and cable" quote on the product description.
There are lots of earphones on the market and the sound quality that some produce is pretty awful. I've listened to some that friends have got with their MP3 players and they can sometimes sound very cheap and nasty. In my opinion, it would be foolish to skimp on the cost of replacing your earphones, especially if you're using them as I am with an iPod or an MP3 player that you've spent a lot of time loading up with your favourite music.
Admittedly, I've only been using these earphones for a few weeks, but I can report that so far, they've given trouble-free performance and their sound reproduction is superb. I was a little worried about the clip-on aspect; I'm not used to this type of earphone, but I've found that they're actually very comfortable to wear. They're a snug fit in my ears and they don't fall out when I'm running to catch the bus!
As some other reviewers have mentioned, the box that they come in is the packaging equivalent of Fort Knox, but don't take the scissors to the box, it opens by following two instructions printed on the box itself - at the top end and on the right hand side. There's a carry bag for the earphones with a magnetic seal, but this bag is really too small to fit them into tidily. This is the only real criticism that I have with this product.
So, these are excellent earphones and well worth the money. Highly recommended.