iOS 7 jailbreak questions


So after listening to the vergecast I was interested to hear that Josh was considering going back to an iPhone, but said he'd have to jailbreak it. I've never jailbroken, but a lot of the stuff you can change sounds awesome. I like iOS, but I would definitely add or remove some features, like the updating weather icon.

I just got a 5s in November, and I'm tempted to try it, but I don't know much about it. How do I do it? Is it safe? Will it void my warranty or brick my phone? Is it unstable? Is it complicated to do or undo? Will it be messed up with iOS 7.1? Also, what are the best apps/tweaks for it?

If you guys could help me out I'd really appreciate it. Thanks!