You obviously know nothing about Jailbreaking if you listed Cons as none.
Cons:
-Idiots who have no idea what they're doing and know nothing of technology to begin with brick their iDevice while trying to jailbreak it
-The same idiots as stated above download god knows what from cydia and add bullstuff sources and forget their iDevice up
I've jailbroken Multiple iPod touches (3rd and 4th gens), an iPad, and an iPhone 3, 4, and 5. I have never had a single problem with any of them, though I'm sure if I did I would just reset it to factory defaults and it would be fixed. You have to have the IQ of a garden fence to screw something up. Hell, nowadays it's just "Download Evasi0n, plug in iDevice, run evasion, click "jailbreak" button and be done".
I would like to know some of these "cons" you speak of.
I'm just going to go out on a whim here and say you're one of the people I listed above..