I like this phone for the following reasons:
1) Slim, light weight, I like the finish and it looks premium. A decent business class phone.
2) Screen clarity is very good. I keep the brightness at 30% for indoor and it’s more than enough. This helps save battery also reduce any possible screen heat.
3) Pure Android experience. Google have put all brains and money to design UI & features. I believe the extra skin/bloat wares(Samsung touch wiz, HTC sense UI, etc.) spoil the experience. Though touch wiz and sense UI might look cool at the beginning but over time with updates the phone gets snappy and slow.
4) Battery: 100% at 8am- I come home with 40%( I am heavy business user-emails, phone calls, conference calls; always connected to 3G network; Have 24/7 active social network connections: whatapp, linkedin, FB, Twitter, News). In my opinion it’s a Good battery.
5) Fast and fluid UI experience. Due to office policy I have to install encryption- still the UI experience is very good.
If you are a business user, looking for a good looking business class phone to connect with office and do some productive work - I think this is a good device. I don’t play games or watch lot of movies, so I am unable to comment on those aspects.
I have been using Iphone 3GS, Iphone 4s and Windows phones in the past. Nexus 5 is in par with my previous devices and it’s a new experience.