Should I upgrade my iPhone 4 to iOS 7.1.2?

I haven't upgraded my iphone to the new version. I was wondering if it was worth it. I don't like the look of the old version, but I've read that if you upgrade it, it will make your phone slow? Is this true? Should I upgrade it? Are there any benefits if I upgrade it?

Haha, I just updated my friend's iPhone 4s to the new version yesturday. Ok, yes, we've all heard that it makes your phone slower. It doesn't. Actually, you're able to do things faster. For example, it's easier to close applications. Instead of holding down on the app, you swipe it across the screen instead (faster). At first it may seem slower or that it drains your battery, but that was just a bug Apple fixed on the original "new" update. You'll get used to the new look. You just feel more "up-to-date." On the music app, there's a new ITunes Radio. On Messages, it seems faster when you text. Trust me, it's all false information;everyone's got used to the "new" feel of Apple now. TRUST ME, you'll like it! #UpToDate