Should I upgrade my iPhone 4S from iOS 5.1 to 7.1?

Should I upgrade it?
Is it worth it?
What are the pros and cons?

I waited because of battery life and performance.

Is it worth upgrading?

IOS 7 looks childish, I hate the iOS 7 theme, and the appearance of the apps that are re-written for iOS 7 are worse in my opinion. IOS 7 is not one but many steps backward in appearance. And about functionality there are not any good features that worse the update, But if you are a girl, chances are very high that you like iOS 7 appearance more that 5, So if you like the appearance, update, There are no cons.

To me I stay on ios 6 or 5 or lower I was trying to get my ipod 5g on ios 6 but to me I like ios 6 /5 when I got my ipod 5g I thought it was going to be ios 6 on it but I'm stuck on ios 7 right now I'm running on 7.1.1 I hope I help your question