I've been comparing the Sennheiser Momentum HD1 Free and SoundMAGIC E11BT.

Very comfortable with incredible sound quality, they have a very polished appearance and do not look cheap; Flat cable never tangles

CON: -If there's wind, they become unusable, I'm guessing this is because of the form factor; Unfortunate

Until earlier this year I thought of Sennheiser for quality headphones, then I reviewed the Flex 5000 which came with a set of earbuds, since then a pair Sports buds and now this Bluetooth offering to give you total freedom of movement.

The sound quality is great, using on iPhone.

Great sound; works good with the iPhone

I read a LOT of reviews before buying these, the general consensus was the sound quality was fantastic with the odd mention of the high end being a little too eager, and not much esle to complain about other than the weight of the battery & button blocks.

The Sennheiser Momentum In-Ear is definitely one of the best in-ear headphones on the market. Both the wearing comfort and the sound leave nothing to be desired, and the puristic, elegant design will make you rave. The workmanship and the functions are simply the icing on the cake.

Sennheiser has extended its over-ear and on-ear Momentum headphone line into the in-canal earphone realm. The $99.95 Momentum In-Ear  earphones are significantly more affordable than the previous Momentum headphones, but they still come with an air of luxury thanks to their simple, elegant design. The Momentum In-Ears' sound signature is unique, more bright (in the highest frequencies) than crisp (in the high-mids), and fully capable of delivering powerful, distortion-free bass at higher volumes. Is the sound too bright? At times, yes, but in the age of booming bass, that's almost a welcome anomaly. If you can spend a bit more, the Editors' Choice Bowers & Wilkins C5 Series 2 ($275.00 at Amazon) offer a less bright, but even better-balanced sound. One note: The Momentum In-Ear is offered in two models—the Momentum In-Ear G  (for most Samsung, LG, Sony, and HTC mobile devices) and the Momentum In-Ear I  (for Apple iOS devices). Both models cost the same, and the only difference i...

The Sennheiser Momentum In-Ear delivers bright (sometimes too bright) highs, paired with a powerful low frequency response.

Powerful audio performance with robust bass response and bright highs; Lightweight, elegant design; Excellent carrying case

Can be too bright at times; Only comes with two pairs of eartips