Pretty early to be sure but with more than a day looks good. There is a long thread with lots of discussion already. Most seem to agree battery is good.
I don't know about you guys , but it seems that I'm going back to .190 , because the battery drain rate went up to 6.44% , after being 3.6% , or I'll wait for an official release that's higher than this one.
Its only been one day, but I like this os. Its a bit smoother than .190, and the batt life seems ok. I know its to early to call it, but .258 looks promising
I'm on my second day. The os runs smooth as silk. I haven't had much chance to try any of the new features like hotspot or media server yet. The battery seems to be about the same as the 7.0 I was running before.
I've only just got a 9360, but I put 7.1 (258) on it and it seems good. Battery life good also. Discharge rate of just 2% per hour using the battery diagnostics utility. The battery won't be fully up to speed yet either with it being brand new.
Just a quick update. From my phones 3rd ever charge, it's lasted 8 hours so far today, and the battery is at 90%. So it's on track to do about 80 hours on light use (texting and some internet).