I have these headphones for a year almost. So here is a review of someone who has these for some time now. They are not the best headphones, but for the price they retail for they are by far the best headphones in the market. The on thing that stands out for these IEMs is that although they are loud, they are still able to maintain an amazing level of clarity in the sound.
Pros:
1) Very loud - they will make your lower the volume
2) Neat, clear sound and voice - no muddle here
3) Bass is good - not punchy - so bass lover might want to look elsewhere
4) mids are clear and crisp
5) Excellent after sales service by Sennheiser
6) Lovely 2 year warranty - psst they generally replace should you have a problem
