Pros: Nice bass and also hi-fidelity to the original soundtrack

The wires are of great quality,, don't need to worry about them being cheap and inferior.

Cons: Not really...

Pros: Excellent sound quality and comfortable fit. Like all sennheiser audio products, their mids/highs are excellent and the bass isn't overwhelming.

Cons: The cord could be a little longer if you intend on running with your mp3 player in your pocket instead of in an arm band.

Pros: they get pretty loud without distortion. sound is acceptable and more comfortable than the standard iPod earphones. very tight seal with ear canal -- so great for listening in loud environments, airplanes etc. Good value for $20-$30.

Cons: a little bass heavy, but i kinda prefer it or at least got used to it -- it's better than the alternative. i wouldn't call the sound balanced. Cord is pretty short and gets tangled easy. it's made out of a rubbery material and is more difficult than most to untangle, it clings to clothing which causes the earbuds to work their way out when jogging, walking mowing etc.

Other Thoughts: I didn't actually own these, however I did have a pair of Creative earbuds (EP-630 -- google it) which look exactly like these, right down to the cord, the plug, the ring and it's dull finish. I think these are generic headphones or rebranded by sennheiser. Don't expect sennheiser quality sound b/c it has a sennheiser name. You pay for what you get and these are relatively cheap.

Pros: they sound pretty good!

Cons: the assymetrical cable is an absolute joke, why the sennheiser design team went with this is incredible..... i sold mine after a few weeks of frustration

Other Thoughts: this is probably the reason these headphones are so cheap now,nobody wants to buy or own them

Pros: Wonderful sound quality! Excellent bass! Distinct highs and mids. Cancels all outside noise. Stays in ears easily. Cord isn't too long and doesn't catch on my bicycle and get shredded like several of my older pairs, but not too short either, no pulling on my ears.

Cons: none yet

Other Thoughts: These are by far the best earbud headphones I've used. They've actually increased the amount of work I get done. Buy them.

Pros: Good sound, sound isolating, and comfortable.

Cons: None

Other Thoughts: I misplaced my first set of CX300's and bought the CX400's to replace them. But the cord on those is a strange two-piece thing, so I donated those to my wife when I found the CX300's were on close out.

Pros: they lasted @ 12 monts of daily use before the l shaped connector started failing. asking sennheiser if they will replace them.

otherwise buying another pair - jr.com has them for $16

they are that good i'll keep buying even if they break.

Cons: short cord is lame

Pros: They're quite decent at noise cancellation. Walking around downtown with them is almost dangerous! If you can get them to fit right, they have good bass (for the price) mids are slightly recessed. Not much to say about the highs.

Cons: You can hear if the cord is bumped. But it's not as loud and crazy as everyone makes it seem. It's bearable. And if you have a little clip thing or some tape, you can pretty much get rid of all of the noise.

Other Thoughts: I wouldn't pay $40 for them, let alone $80. But if you can get 'em while they're on sale for $20ish, do it. They kill others at this price (see: skullcandy, iBuds, etc). I give them a 4, because I've definitely heard better headphones. But if it were a value rating at $20 to maybe $30, I'd give 'em 5 easy.

Pros: They were on sale, i like the asymmetric chord design. The earbuds fit snugly in my ears and tune out most outside noise.. and there's road work right outside my building as I write this. Sound quality is decent.

Cons: Not enough deep-bass, too much mid-bass for my liking. I listen to mostly heavy metal and its a bit obnoxious when you cannot hear the double-bass in all it's richness , also the guitars sound a little squeaky through the earbuds.

Other Thoughts: These are about as good as any other earbuds out in the market in this price range. Probably should just suck it up and buy earbuds in the above $100 range next time, although most earbuds out there sound alike..

Pros: After reading about the clarity of canal headphones, and being a daily-subway rider in NYC, I was hell bent on finding something that would work for me. Being worried about full canal headphones possibly damaging my ears, I decided to go for these after reading that they're great introductory pair.

They're amazing! The rubber edging fits my ear perfectly, and the set comes with two alternative sizes--one bigger, one smaller--for different sets of ears. The sound quality is excellent.

After having it for over a year (I bought my first pair in 2008, bought a second for my gf recently), I can say that reports of the wiring wearing down are greatly exaggerated. In the summer, these are usually hanging around outside my clothing; in the winter, they're stuffed under my clothes, usually against my skin. There's been absolutely no visible wear, nor as the sound quality been affected.

Other than that, the sound quality is excellent, and its GREAT at blocking out noise!!

Cons: Although the wiring is intact, it doesn't mean its great. The wiring is made of textured rubber, which means that unlike most ear buds, they will catch on *everything*, from your hand to a newspaper. I have, more than once, ripped them straight out of my ear because they caught slightly on my upper arm. Its INCREDIBLY annoying.

Additionally, because the wiring is so thin, using these for running can be frustrating. In or outside my shirt, I can hear scraping noises everytime they come into contact with my shirt. Whether or not this is a function of the fact that they're canal head phones, or cheap material, it means you'll consistantly have to put up with LP-like static.

Let me briefly mention as well, that these use a shorter wire than I was used to. When using these at work, I have to use an extender so that my head isn't a foot away from my laptop. Not horrible, but just a forewarning.

Other Thoughts: Overall, considering the price, these are an amazing steal. For everyday use, the aforementioned rubbing is really a non-issue, and when sitting at one's desk, its even less so. The most important function for me is the ability to not only block out noise, but do it without having to blow out my ear drums--these provide both. Even on a crowded, noisy subway car, I pop these in and with the music on at a moderate level, I can't hear a thing.

Another added bonus? Unlike ear buds, these things do not radiate music. I *hate* getting on a train and having to listen to the noise pollution from someone's cheap iPod headphones.

Overall, great buy; you can't do better in this price range, and with Sennheiser, you know you're getting a quality product.