This review is based on my last one year of use(bought it in June 2017). These are the points of the Macbook air 2015 model:
(1) Battery life is great. Almost 7-9 hours on moderate use using Mac OS sierra. 4 hours of playing games. But running windows 6 hours of battery life. That too good in my opinion
(2) Processor choice is good. 5 generation core i5 is excellent with its performance. Base clock is @1.6 GHz and turbo boost frequency @ 2.7GHz. I could see maximum 2.69 GHz on full load which is acceptable.
(3) The quietest laptop I have ever used. The CPU cooling fan is off most of the time. Yes, it is in full pace while editing video using "adobe premier pro" and "final cut pro." No issue up to 1080p editing. But Lag is observed with 4 K footage as it lacks a dedicated GPU.
(4) Screen quality is excellent but it had been excellent with a retina display.
(5) I am in love with a trackpad. It is just awesome at its price range.
(6) Weight is well balanced and a robust design.
(7) Gamers it is not designed for you as a dedicated GPU is absent.
highly recommended and anyone can buy this if your budget is around 50, 000 INR.