I expected the sound quality to be better (for the price paid). The unit stays in place during activity, but the earpieces are not adjustable, causing the bass response to be weak. All in all, I consider them to be fair. My wife likes them better than I do. She uses them more than I do. I rather the in-the-ear buds, because of the uncompromising sound quality (Shure).

Good Sound, Great fit. The last pair of headphones that I had were the around the neck headphones. These sound as good if not better than those. They fit better than the last pair fit but it took at little getting use to because it was such a snug fit. Also, they don't actually rest on the back of my neck but they stick up a little bit which has caused me to bump them sometimes when I am lifting weights. One other thing that I think I prefered with my other headphones was the wire ran out of the back where as the Sennheiser PMX 70 Sport wire runs off of the left ear peice which it tends to snag my hand when I am running from time to time. All in all, a much better heaphone but it should be for twice the money.

They sound decent for sporting the sennheiser logo, the highs are a little over emphasized and sounds a little tinny. My other complaint is that you have to carry around a Tupperware container with you if you want to put them in a bag, because of the way they are shaped, mine broke within the first 3 weeks, and i was very careful with them. If you don't mind too much treble or have an adjustable equalizer on you device i would go with the around ear sport ones, they stay on just as well, just as comfortable but don't break as easily.

For those of us who are tired of the earbud-type headphones falling out of our ears, or when the long/short cords would pull out the earphones from our ears...this set is for us!! It rests comfortably over the ears and around the back of the neck. Even if you don't have a football player neck, these will work for you. They do not bounce up and down while running outside or on a treadmill. If you are a fan of the in-the-ear design and the way it blocks out all wind and exterior noise, then stick with those. These earphones do allow some exterior noise, but the bass response is healthy. I've used nothing but the in-ear designs with my MP3 players, but got tired of adjusting the earphone to sit properly in my ears. I run 4 to 5 miles almost daily and these earphones have yet to disappoint me after over a month of ownership. Since Crutchfield doesn't have a "4.5 out of 5 star" rating, I gave it a 4.0. No huge complaints from me; I recommend these earphones. But since you don't know me, that may not mean very much!! I like them and would buy another set.