I bought Nexus about 2 years ago. I am a very high end user, lots of gaming, movies and all day internet access. But performance is the key for this phone. Never got any hanging or lagging issue. Not a single flaw in 2 years. Always a buttery performer.
Sleek design and light weight allows me to use it with one hand. As it is a single sim phone. I bought two more phones in between(one Samsung and one MI, which were heavier on paper specifications than nexus 5). Even MI have been 3 times to service center in a year only.
But this phone beats them all.
After such a long time, with this device. I am quiet happy with this buy.