Excellent quality sound and comfortable fit could do with being a bit louder but you are governed by your device volume settings

Good value for the price. If you're like me and do a lot of commuting and have your phone in your pocket but are over your straight pin connector breaking when you sit down on the bus or train then the u-bend pin connector is a must have.

I have small ear holes and most earphones constantly fall out. These sound great and don't fall out

Bought these from Argos. Returned them within 15 minutes. Quite possible the worst Sennheiser headphones I've ever had. No bass at all. I'm all for a bit more style over the older models but style over substance has occurred. Please Sennheiser just go back to making the CX500's.

cx 3.00: comfort=above average. durability=good. bass=average. distortion volume=25%+ sound clarity is good up to 25% volume. cx300: comfort=great. durability=below average bass=good..

Not built to last. The rubber cord has stretched and now one of the buds has stopped working. Expected them to last longer than a year.

Not a music (& technical) geek but can say that they have great sound isolation; Work perfectly fine for using them on air planes without blasting your ear drums on the highest setting for hours.

More colour options? The red was nice; but other colours would be much appreciated

Pretty good but the ones they replaced (cx300ii) were better, a bit too much bass & symmetrical cables suck!

Just everything about these earphones has short term written all over it! The buds slip off and can easily get lost, I've had mine for 8 months and the left one has stopped working with some distant crackling in the right.

I have owned these for a while and can honestly say i like them and use them everyday however the buds fall off too easily and get lost and the shape of the earphone itself can take some getting used to it.