I got my new replacements under warranty yesterday. I am on the east coast, and yes, I am caught in that big snow. So, I haven't been outside since yesterday. I charged them up, after that paired them with my Note 4. My old M2, the cushions seemed a little softer, but that could be because they were broken in nicely.
After pairing with my Note 4, I walked around the house cleaning up, and doing a set of exercise at every stop. My way of cleaning up..
From that little bit I have found out about these new M2s, I have went up stairs and down stairs, 3 floors with the Note 4 on the middle floor,and the M2s have yet to stutter. Will take them outside tomorrow, and see what they do while outside and around electrical interference.
At this point, I am IMPRESSED with Sennheiser's customer service.When I emailed them about 6 months ago, about the stuttering, I was lectured on connection problems and all. This time when I called, (6 or 7 months later), they just wanted a copy of my receipt, and they sent me a return label. Whole process took about 7 days.
At this point, I am quite sure these will perform just like the first pair in SQ, and that was good to me, and any connection problems should be cured. I am a happy camper..
BTW, is there a BT Headphone out there better than the Senn M2AEBT, if so, tell me about it..