Short report from yesterday's outdoor session with this build on my 1520:
++ Rock solid! I did not suffer from any unwanted app crashes or reboots, where 10572 was really unusable. Seems to be not the case for everyone, so I hope MS finds the right tweaks to get it stable for all out there.
++ Guess I don't have to say to much about performance, will try my 820 later today to find out if it sees an equal boost.
+ Battery life is fine, at least as far as I can tell from that single session. But I would not yet say that it is on par with 8.1, maybe more like 75% in comparison. I took the camera issues and one reboot connected to it into account. However, most of the time I had my geocaching app open which has the same demand for GPS and display under W10M as under WP8.1 I guess. Having a look into battery usage, I have the feeling that the new Messaging app makes the difference, although I only used it for text messages yesterday, Skype just logged in.
- The camera issues as described earlier really have to be sorted out as they are a true show stopper. I had to wait in front of a group of people trying to take photos of the nice valley view while the Camera said SAVING... But I like the refreshed and nicely integrated UI.
As you can see I don't have too much complaints about this build. Just fix the known bugs, add some of big missing features from 8.1 and I'm going to be really happy!