It works intermittently for me since I switched to a 950 DS (currently Build .107). I get text, call, and calendar notifications consistently, but pushed email and Notification Center messages are hit and miss. Cortana and keyboard functionality work intermittently too. Believe me, I've tried various combinations of resetting, rebooting, uninstalling, etc (on the Band 1 and phone), but to no avail. I'm glad to hear that it works on other Lumias running W10M preview, but sad that it's wonky on my 950 DS.