I, ve using this phone since a long period of time, and I am very much familier with it too, as I know almost everything about it. the most amazing thing is the shutter speed of the camera. it works rediculously fast. the only little issue is with the fingerprint sensor as it not works as fast as other new releasing smart phone, but it is launched too much early, and because of this the company could not able to do as good fingerprint sensor as now in phone 6. and thats the reason behind the little slow sensor of iphone 5s. According to my opinion it is a perfect phone for any working or buisness person.