Is Jailbreaking my IPhone 4S a good idea or not?

I use lots of apps, especially games for me and my lad.

In simple terms can someone give me pros and cons of jailbreaking it, and their overall view

**disclaimer**
Jailbreaking an IPhone is perfectly legal

Added (1). Slows down the iphone
drains battery alot faster
---…

Is that because of the extra apps, or does the actual jailbreak do these?

Cons
warrenty void
slows down the iphone
drains battery alot faster

Pros
some ok themes

Why not? You can customise everything and get free apps. It voids the warranty but jailbreaking alone can't ruin the iphone. If you get any problems you can just restore it by plugging it in while holding the home button. Plus, if you have it on contract you'd just have to wait until your next upgrade if it were to go completely wrong. I think your best bet though, is selling that iphone and buying a galaxy s3, they are actually better.

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