Summary: I bought these a few weeks ago, and like the other reviewer mentioned, they don't do anything too special. They are fairly detailed for an IEM at this level, and provide globs of bass. The inline iphone remote is especially nice. There is quite of bit of microphonics.
I will be keeping these as IEMs to use at the gym.
Summary: I listened to these very carefully, and although I almost fell in love with them and their very businesslike appearance, I did feel like an idiot for wearing something that's all about its looks. Swapping between these and similarly priced earphones I found that while they're inoffensive, they were doing nothing out of the ordinary besides looking like a million bucks, and their writeup on Senn's site and the packaging seemed to back this up.
Summary: These are definitely good quality and do seem to be exactly the same as the originals the headphones came with. Having lost the previous large ones Id been struggling on with the medium ones moaning about how much better my cheaper headphones sounded. Now Ive got the right size back it transforms how they sound!