Is it worth upgrading my iPhone to IOS 7?

What are the new features that come with it?

Added (1). I also have an iPhone 4 if that makes a difference

Why wouldn't you upgrade it?

Definitely worth it. Aside from all the technical advances, would you really want to be stuck on an older verion of iOS or any platform for that matter? Stay constant with technology upgrades or you'll end up like some of those people still using Windows 98.

If its a 4, you might want to wait until it gets more stable, both my friends updated Thiers. IPhone 4 runs mostly good but it is slow sometimes. IPhone 5 has no problems.

Its crap