It is a great phone. There are many new changes which are worth giving a try. The potrait mode introduced in this model gives you a real feel of a DSLR camera. An extended battery life as compared to the smaller version of this model. It has the fastest processor any iphone has till date.
The bigger screen gives a better resolution.The 32gb variant wont let you fall low on memory.It is water resistant upto 1 meter and 30 minutes . The dual camera will help you take great pictures in low light.