So I have A 920 running 8.1 preview, Got a 635 to do win10 testing on, got the 950 yesterday morning. So the 635 had its own back up so never looked quite like my 920 for the screen, did a restore on the 950 from the 920 back up. Over 200 downloads and updates, but the screen set up exactly like my 920, weird thing is the individual contacts I have pinned are square, which is a 8.1 thing not 10. So 10 on the 950 is much smoother than 635 closer to 8.1 smooth, messaging and couple other apps have crashed, but 2nd time going in still is almost as fast as my 920. So did a quick test between the 3 on audio external speaker and headphones. Loudest external is the 635, then 920, then 950(eq setting for external speakers yippee) by a little- all at 15 didn't do a max for distortion. Headphones all at the same number setting for all 3, bass boost on the 920 and 950, sound comparable. You turn the Dolby on the 920 and it beats the other 2 much nicer. Skull Candy headphones in ear. The screen reaction times for brightness seem to be a little slower on the 950, how ever the 950 is white, 920 has a yellow tint, both are set to neutral color profile. So 3 hrs from 100 to 63% I have had the screen on almost the entire time, going thru settings and various apps, some texting, downloaded 10 updates or apps and listening to music via headphones. Windows hello is interesting yes it does need to be somewhat close, but you don't have to be looking at the screen, I was reading over the top of the phone at my computer and it still unlocked. So far I like it a lot it has the extra features I would have liked on my 920, MicroSD, and thinner, Win 10 definitely works better on it than the 635, is it the ram? Any Glitches in the OS will be updated and hopefully they will add back in some of the features of 8.1. Yes I would recommend this phone to anyone who is not appcentric( got to have that specific app that isn't on windows).