Pro's :
-
FREE apps

-Customize almost everything
-install 3rd party apps
-In-App Purchases can be free for some apps
-Install
FREE music on itunes ( does not work with all songs )
Con's:
- Apple warranty gone ( can simply be undone by just resetting the phone )
- May drain battery faster ( depends on what apps you downloaded from cydia )
- Stability issues if you dont know what ur doing ( for ppl who know what they are doing this problem won't occur )
I'm an HUGE fan of jailbreaking my iDevice itself, i've done it with my 4s and with my 6+
in the beginning of a new IOS it may become buggy because not every cydia ( the app store for 3rd party apps ) tool is updated to run on it, but after a month ( just like with ios 8 ) almost every app runs smoothly
go jailbreak ur device i would say, and IF there is an hardware issue and ur able to reset ur iPhone to factory settings do it
and if you need help with anything feel free to PM me
