Summary: In my spare time I am a musician and I think I have fairly well tuned ears. I own a pair of Shure 535's with custom moulds. The 535's are stunning. So much so that I have ended up "keeping them for best." I bought the 425's to use as my everyday set. If you want pure sound quality over and above anything else then Shure is the obvious choice. The soundstage is immersive. The sound is neutral and detailed without any horrid bass boost features.
Summary: I mislaid my earlier set and upgraded to these. No regrets. They keep external noise out, work at low volume and save my ears with a full frequency response. I have always made sure that my hearing is not overloaded so that I continue to hear the slightest whisper. These earphones have helped me to continue with this requirement.
Summary: I had used Etymotic earphones for a number of years but when my second set failed the same way as the first I realised I needed something else. The Shure ones seemed to be a very good set with little chance of failing in the way the Etymotics did, so I bought them. Having used them for almost a month I know they will take some damaging. A fine purchase if you like earphones as opposed to headphones.
Summary: These are an absolutely outstanding pair of IEMs. Sound quality is unlike anything I've previously heard with superb highs and mids however may be slightly lacking in bass depending on your personal preferences, however this is easily overcome with the aid of a small headphone amplifier which I would highly recommend if you wish to get the best out of these earphones. The sound is clear and natural and you will not be disappointed.
Summary: I really love the design of these headphones. They seem to have that covert security ear-piece look, e.g. a bit like the US Secret Service. And that's what I really like most about them. Shure is such a good make of headphones. More importantly, the sound of these Shure headphones is completely superior. And they are superb when using them on the plane. No sound leakage whatsoever.
Excerpt: Ces Shure SE 425 sont tout simplement ahurissant : précis, détaillé, aéré, neutre, le top ! Bon maintien dans l'oreille, il faut cependant un temps d'adaptation pour parvenir à les insérer rapidement (le cable doit forcément passer au-dessus de l'oreille). Le modèle transparent a un look sympa et demeure très discret une fois dans l'oreille. Le son est bien meilleur que sur des casques comme le Monster Beat Studio (basses totalement déformées).