My experience thus far has been pretty good. Day 1, I used the phone quite a bit and from 63% charge it got down to the upper 20s before I put it back on the charger. That was from about 5:30PM till 10 or 11.
On Day 2, from a full charge, I was at 16 hours of moderate to heavy usage (played a game, watched some videos, browsing, checking email, fantasy football, reading articles, playing with settings, etc.) when I put it on the charger at 22%. The thing is, I knew I hadn't put the charger in very well, but it showed the charging icon, so I left it. At some point between 4AM and 9:00AM, the charger had fallen out. When I looked at the phone it was at 11% (I have Battery Saver set to turn on at 20%). I plugged back into the charger.
So, on Day 3 I pulled the phone off of the charger at about 12:30PM. at 100%. With light to moderate usage, I'm currently at 44% at almost 3AM. That's a 56% drop in 14:30 hours.
I have both Hey Cortana and Windows Hello turned on. I've got two email accounts, both set to "Based on my usage". Some background services have been turned off for apps that don't need it. While many others are still on. I don't use Facebook, or 3rd party messaging apps, but I do have Twitter and Tweetium.
Also, I DID restore from a backup. Although, that back up was from a device running 10586.11. So, it looks like, for me, that I should be able to get 25-26 hours of light to moderate use and somewhere around 17-20 hours of moderate to heavy usage, give or take.
If anybody wishes for me to detail anything in more specific terms, let me know.