Almost one year and it is still a beast! I did not buy this phone on Amazon but bought it directly from Google in November last year(while I was in US). Since the phone has been with me for about an year now, I am tempted to write about how wonderful this phone is.
Display and body:
The display has been stunning and it remains so. I am not using any screen guard or a case for last several months and there is not even a single scratch on the screen. I am not over protecting, so I can vouch for the screen quality. The back of the phone does have some signs of wear but that is bound to happen to a white phone with no case. Still, it doesnt look like its been used for an year. My Samsungs got really ugly within 3-4 months only.
Performance:
I have used Samsung Galaxy Note 1, Note 2 and HTC One and other than HTC, all Samsungs would get slow over time. I have had to reset the phones every few months to recover some of the performance back. With Nexus 5, it has been performing exceedingly well and I havent reset it yet. The Snapdragon 800 processor is still one of best out there. I did have to reboot the phone a couple of times when the phone kind of hung, but that looked more like a third party app issue.
Battery:
This is the weakest point of the phone but is still good for a day of heavy usage. After 1 year of heavy use, I have noticed marginal decrease in the battery capacity, about 10% I would say. With a moderate usage, the phone can last for 1 and a half day easily, which is what most smartphones would last anyway. Since I always have access to some sort of charging facility, the battery has never been an issue for me, but could be for others.
People have already said a lot of this phone, so I wont add any further. All I would say is that if you really want to spend more than 20k on a smartphone, then dont even look at any of the Micromax/Karbonn/Lenovo etc, just go for it. You would love it for sure.