Has your Battery Life improved overtime for the Nexus 5?

Since the Nexus 5 was released, it seemed to have been met with much praise and has been regarded as the best bang for your buck. But, there seems to much difference of opinion with regards its battery life. Some say its average at best, while others report solid reviews and claim it will last a full day without any issue. Marques Brownlee (MKBHD) more recently posted a video stating his battery life has actually gotten better over time.

As someone who is interested in purchasing a Nexus 5, I would like to hear some feedback from you who have spent some time with the phone, and would love to know how much Battery Life on average you are getting (And screen on time). Has your battery life gotten better overtime? Does switching to ART runtime help?

I hope to get some clarification on this, thanks.