Le creme audiophile grade cans. The sound is clean via BT. I use them for work. Better than self acclaimed gold standard QC35 BOSE. Yes. I bought all three. For test. BW P7. QC35 BOSE Sennheiser

Prior to buying these, I have had numerous other Sennheiser headphones (280, 598, 580) and earbuds as well as some headphones and earbuds from other manufacturers. Most recently I had been using Bose headphones at the gym because I just don't like having a cord between my head and my phone while I'm exercising. The Bose sounded good (better than I expected given my previous experience with Bose), but after a while I found myself getting tired of their excessive upper midrange/treble boost. Given that Sennheiser generally leans towards the neutral - if not warm -- side, I thought I might like the M2 better. In a nutshell, I do like these quite a lot more than the Bose headphones. Are they the best headphones I've ever heard? No. They definitely sound a bit better wired without the noise cancellation on, but I didn't get them for that sort of situation. Even though the noise cancellation and bluetooth technology make the sound signature a bit less detailed and more bright, these still sound quite good. Would I recommend these at their full price if you DON'T need bluetooth or noise cancellation? No. You can get better sounding alternatives for less money. These are quite satisfactory for the gym (as long as you understand that you will sweat onto the earcups so you'll likely need to replace the pads every so often). I can wear these for two hours or so and not feel uncomfortable.

I bought these and the Bose QC35's planning on returning the pair I liked the least. On first impression I was certain I would like the Bose better, but the M2's really grew on me. The Bose are by far better at noise cancelling, but that is a difference that is really only noticeable when no sound is coming through them. With music on at 50% volume I could not notice a difference whether in a busy waiting room, around typing keyboards in the office, or just sitting on the couch with the TV on or the vacuum running. I had no issues pairing both sets to multiple devices and switching back and fourth. I never reached near a dead battery on either set and both perform well for taking calls. The deciding factor for me was the everyday comfort of the M2's and the superior sound quality. This is not to say the Bose sound is bad, but the M2's just sounded richer. When listening to the same songs at the same volume the M2's always just sounded a little better. Also for me the Bose didn't quite feel right on my head they were comfortable, but somehow felt a bit foreign to wear. Lastly, the pressure sensation on my ears that Is expected with ANC headphones did not feel as pronounced with M2's. My recommendation is to try both for a few days to see which really meets your needs best. For me the Sennheisers were the best choice.

Price tag is a bit steep but these are extremely comfortable and great for making calls - have not had any issues with bluetooth going in and out Noise cancellation is great - but not quite as strong as Bose

I have quite a few headphones and I have been working on getting some wireless headphones that I can get the most out of. I think there is a fair amount to say about these but to cut to the chase, these are solid in construction (they feel like they cost this much), even though I have a large head, they don't press on my to make it uncomfortable, the noise canceling is great, the sound is nice and clean (balanced and without lots of bass), and they can be used as lined headphones if you run out of battery. Overall as great as expected. I like them over my Bose and aster and Dynamics.