Actually, Now's time goes under Maps- at least the location services, which are the big draw. I have all of the tracking enabled, and maps uses between 20 and 30% of my overall.
Oh, in that case, yeah, it is using a fair amount for me too -- don't get me wrong, I'm still at 85% after charging it this morning, but maps is showing about 30% of that.
Lucky :) Even if I don't use my phone at all, it'll be below 80% by this time, and Maps & co seem to be a major culprit, since Now keeps on chugging even when the phone hasn't woken in a long time.
Interestingly, GSam battery monitor (which I just got last week, and is really neat!) shows the number of times each app woke the device. I've been on for 4.5 hours, and Maps is at 441, with the next Android System at 85 and Google Search (which is Now) at 53.
Android System has also shown up more in usage % since I started having Now.
I think there's definitely a significant drain with Now. I've had it enabled since the Verizon release, somewhere around 12/20, but I think I will disable it at the start of next month and keep an eye on how it behaves. I certainly feel that my battery life has gone down since the upgrade.