After playing music via bluetooth my entire morning commute (40min) and checking my feedly for about 10 minutes the battery was at 92% still. By comparison my GNex which I did absolutely nothing with this morning was down to 90% haha. Last night when I got my N5 I played with it for the screen on even doing a google hangout w/ camera for about 5-6 hours and got it down to 20%. That's pretty considering how hardcore that usage was (benchmarking, installing stuff, video) and I haven't even gone through a couple battery cycles yet.
I am definitely satisfied with my N5, also with T-Mobile.. for me their service is actually much better than Verizon's
EDIT: forgot to mention I switched the runtime to ART instead of Dalvik.. dunno if that is making a difference or not but I don't notice any stability issues yet.