Re: #1 reason I bought the Moto X Pure Edition
No, stock Samsung firmware (currently on 5.0.1 / N910H Exynos). I spent about 90% of my time on the desk with a land line next to me. The phone is merely for the rare out-of-office occasions where I have to let a client know when I am late or just sending a quick text message or emailing on the go + calendar / contact management and notes. Screen on time, about 1 to 1 1/2 hours / day max.
Yeah, I know, it's a bit unfair to compare it to the OT's battery with my low usage but, in comparison, I had the S6 in between and ran out of power already within less than 24 hours under the exact same conditions.
Nothing beats my Note.