Pros and Cons of jailbreaking an iPhone 4S?

I purchased an iPhone because I wanted to jump on the bandwagon. There are things I love about Apple, but there are also things that I miss… I was thinking about jailbreaking it, but I want to know the pros and cons.

Please keep all of the stupid arguments about whether apple sucks or not out of the answers. All it does is add clutter to my "thread".

Pro: you get some things free
Cons: your phone runs slower, crashes, voids apple warranty, more vulnerable to malware
(Don't do it I did it once, it was a waste of time)