Well, the MM100's arrived finally. Free shipping is great but I think they must strap it to a turtle and send it along!
Anyhow, the phones are just okay. The first and biggest issue is there is NO noise-canceling whatsoever. I'm not really surprised by this because as I looked at them I was wondering just how some relatively small, behind-the-neck headphones that don't have much in the way of sealing could use NC technology successfully. Well, they can't. I'm not really sure why HeadRoom has these down as NC headphones but they are not. There was nothing in the nomenclature about them being NC and a quick look at the Sennheiser website confirms that these are not NC headphones.
Beyond that they are not too bad. They are certainly not up to the PX100 sound but for a bluetooth headset they are pretty good. Certainly the best quality sound I've heard yet from a bluetooth headphone. They are comfortable and everything worked flawlessly as advertised (the usual bluetooth/cellphone operations) but in the end the sound was not enough to make the steep price ($149) worthwhile. So I am going to send them back and try something else. Oh how I wish my ears could tolerate IEMs!
Anyway, if anyone is looking for some decent sounding bluetooth, behind-the-neck headphones, and $150 is in your price range, these aren't too bad.
M.