Great replacement for the small size ear adaptors that come with the earphones. Exactly like the originals, I lost one and had no more small sizes left so this is great. I was only expecting 1 pair but then when it arrived there was 5 pairs, which made me happy.

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

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.

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

The Sennheiser Momentum In-ear wireless is a testament to the fact that some designs become popular enough to find appeal across brands. The Sennheiser Momentum In-Ear is almost a replica of the LG Tone Infinium, a design that has gradually become popular with a cross section of users from joggers...

The Momentum in-ear earphones offer great performance for everyday use. You can confidently say that these are probably the first earphones that come with treble boosting while also delivering great bass response.

Vibrant mids Bright highs Strong cables that are tangle-free Metallic ear pieces Very low distortion even at high volume Good looking (Swaggy) design Wonderful; compact carry case with enough space to store 2 more earphones

A little bit pricey Would expect an additional pair of ear tips Some music tracks can sound too bright

I bought these when my Klipsch S4i started dying (volume is cutting out on the left channel). Fair enough – 7+ years is a long service life for a pair of inexpensive earbuds. My first priority was compatibility with my 3G iPod Shuffle, which needs a 3-button remote to operate.

Fluid; musical sound; build quality

Flat soundstage; uncomfortable ear tips

These Sennheisers are the first in-ear model to join the Momentum series, which has helped to establish the company as a top choice for people after stylish headphones with better sound quality than Beats.

Powerful low-register bass; Good detail; Nice mid-range tone; Separate iOS and Android versions available

Recessed mids

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.