Hi and Welcome,
I don't own the s4 but have had a demo of my friends handset and the working models in the high street shops.
The phone and its specs are really impressive.
The only two things I'm not impressed with is the flimsy back and that the 16gb model has only approx 8gb internal storage left after the specs and gated off space for future updates are taken into account.
Hopefully a s4 user will come along to give you a more in depth review.
