I got S4 when it was launched; the phone had already become a hit even before its launch. I would say that it did justice to all the hype.
I was happy with the performance. The camera, media all were good.
The battery stayed for good long 2.5 years. I had the phone for almost 3 years with me, I changed the phone as I had it for a long time and the battery was not able to hold it up and the repair cost was coming up little expensive. The only problem I had throughout was the sound range(during a call). Overall satisfied.