I have used these for many years, buying them in the stores back when they were available and since then from Amazon. The two failures were lost foam buds (the replacements they sell here work fine but may need to have the tube opening expanded gently when inserting) and the cord or connector. I often wear just one earpiece, when I want to be polite and listen to the people around me, so when one earpiece goes bad I cut that one off and wear them in more social situations. When there are two earbuds I wear these to a roller skating rink to drown out the kids and the music played to appeal to them. They work really well for that and for my listening needs, non-audiophile who listens to old rock n roll and audiobooks, the sound is fine.

I would in the past have given these a 4 or 5 rating the pair I bought in April 2009 failed more quickly than the old 90 degree plugs. I've tried a number of other earbuds since then (Target, Best Buy, etc.) and nothing is as comfortable. I haven't tried any of the really expensive ones because I lose things and I'm cheap. So, I'm back to buy more, knowing that the quality isn't as good as it was, but I don't like the ones I just spent $20 on and I'm coming back. Maybe Koss will fix them up for us again.
I have used these for many years, buying them in the stores back when they were available and since then from Amazon. The two failures were lost foam buds (the replacements they sell here work fine but may need to have the tube opening expanded gently when inserting) and the cord or connector. I often wear just one earpiece, when I want to be polite and listen to the people around me, so when one earpiece goes bad I cut that one off and wear them in more social situations. When there are two earbuds I wear these to a roller skating rink to drown out the kids and the music played to appeal to them. They work really well for that and for my listening needs, non-audiophile who listens to old rock n roll and audiobooks, the sound is fine. I would in the past have given these a 4 or 5 rating the pair I bought in April 2009 failed more quickly than the old 90 degree plugs. I've tried a number of other earbuds since then (Target, Best Buy, etc. ) and nothing is as comfortable. I haven't tried any of the really expensive ones because I lose things and I'm cheap. So, I'm back to buy more, knowing that the quality isn't as good as it was, but I don't like the ones I just spent $20 on and I'm coming back. Maybe Koss will fix them up for us again.