Excerpt: Look and feel just like the original. Same size and color. The headphones look like new after putting these on. Minus one star becuase it was somewhat challanging putting them on. Also, the thin faux leather that covers the cushons deterioated completely after several years of light and careful usage. I am afraid the same fate awaits these cushions as well.
Summary: I was extremely impressed with these headphones when I first purchased them. Clear, crisp, open sound, great separation, tight bass, and ultra-light and comfortable. I have both the Sennheiser 280pro and the PX100s. Certainly the 280s sound better, but if you're not doing an A/B comparison, you could listen to the PX100s and have very little complaint - and for longer: 60g vs. 300g! - and for their price point and comfort, I'm not sure you can do any better.
Summary: After about a month of research I bought 2 headphones from Amazon, the PMX70 and PX100. These headphones were for use while on short distance travel or the morning walks and the treadmill. My primary headphone the Bose QC3 has a reserved place for long intercontinental journeys and the weekends. The headphones are used with multiple iPods (2nd generation to the iTouch).
Summary: A little miracle, for the price. Almost linear, full extended, but the bass, although very quick and tight, is 3 dB over the "ideal line". Very portable (they come with a rigid box for storing safely in your pocket), very comfortable. Mid-highs a little harsh, highs well extended. Mids good, but a little ruined by the mid-highs. All in all, a great inexpensive portable headphone. And they look cool!
Summary: The PX100s are in the same league sonically as the Koss Portapros, but have a slightly different sound. The PX100s have bass that doesn't get too overbearing, which is good. Highs aren't piercing and extend nicely, and solid mids. The build quality is very good, with pleather material on the headband and a nice sleek design. They are a great value, and offer a slightly warmer-sounding and more balanced alternative to a few other portable phones in the same price range.
Summary: The PX100s were the second decent portable headphone I bought after the KSC75s, a silky-smooth contrast to the shiny, aggressive sound of the Koss clip-ons. This particular review was written when I was very new to the world of Head-Fi but in general I stand by it.Build Quality: Designed to be portable, the PX100s fold beautifully into a tiny package and fit into the included plastic carrying case.
Pros: Extremely lightweight, comfortable, and portable; smooth and enjoyable sound
Cons: Quite dark, rolled-off treble, bloated low end
Summary: I have long used these headphones before I really got into headfi and they have served me well. Unfortunately the cable became damaged after 3 years of extensive use and broke on me. The only thing I did not like is the lower frequencies sounded colored and I did not even notice this until I heard other headphones. But for a little more money you can get better IMO like the ATH-AD700.
Pros: Detail is pretty good for price
Cons: Colored sound, Too much bass, not as much detail as higher end headphones
Summary: the quality of the sound is pretty good. The comfort of the set is ok for short term but can get unconfortable over long use. at full price I would not buy them but if the discount is 40% or better then they are worth the price.