We use Iphone at work, however, I personally run with Android as I like to be able to modify my phone according to my needs instead of the other way around.
But, the biggest reason I switched phones from the previous, battery life. The first 2 weeks I was really happy. I basically use the phone only for job cases, call, mess, etc. And now I notice that after a month the battery life is down at least 30%, I don't think Apple can live on as a brand with as poor quality as they actually have.
But, sum total, it's a better phone than the iphones I've had before, significantly. But, the same problem as always with Apple, the quality is a joke.