I've had this phone for a couple of years now. It's worked great - the only thing I've had to get is a replacement battery because the original battery died. The phone is rock solid - and I love it. I'm thinking about replacing it with the the S6 or maybe waiting till the S7 comes out.
My Samsung Galaxy S4 has been a true work horse for my business and personnel life. It has helped me keep track of texts and emails while allowing me to receive calls. The scope and breadth of apps is also a great help in staying current. It even has a fitness tracker that has helped me lose weight and compete with friends on who had the most paces in given day , week and month. The camera has provided me option of providing customers a high quality visual image of projects I perform for them. I would not change from a Samsung product.
Pros: Realistic color, Bright display, Durable, Lightweight, camera