I bought these when my previous Sennheiser true wireless earphones gave up, hoping for a similar experience. While the sound quality is still excellent (to my ears), other aspects have taken a step back.
Physically, they're less comfortable in my ears, feeling a little loose and without a replaceable tip it feels like there's nothing I can do about that. The charging box also feels flimsy, especially the hinge, which is very loose and easy to accidentally close while you've got the case open.
Technologically it's not great. I had it paired with my phone and iPad, and while I tried to watch a video on my phone, it repeatedly stopped the video and resumed playback on my iPad, despite my not having interacted with the earphones in any way. I'd press play on the video, it'd play for a second, then stop and begin playback from my iPad. My only recourse was to have the iPad forget the device.
It's also not compatible with the Sennheiser Smart Control app. While I have mixed feelings about the app, it was nice to have an easily-accessed place to deal with bluetooth problems and to have an equaliser.
Overall they're decent earphones, but with some annoying niggles.
