I bought this Microsoft Lumia 540, 1 1/2 year back since I love Microsoft/Nokia collaborative products.
It has an elegant design, very slim, less weight with multi color(Mine is a black color mobile).
It is very easy to use if you havent used Android before this.
Display and voice quality is very nice. I can give 5 stars for this.
Thinking about the App Store it has very very less number of applications in the store. I have been restricted and struck with many application features, a disappointing factor.
Still now I didnt face any issue with my mobile except network issue, some times my mobile will be very calm I have to restart the mobile to make it noisy.(Sometimes network will not work as I expected then I have to restart it).
Good battery capacity.
It is value for money(If you wont think about resale).