^^^ Exactly what I was going to say it's all a matter of choice. I like it because I'm able to use my own wallpaper for both my unlock and homescreen, I'm able to record video on my 3G with cycorder, Able to connect to my phone to get my videos, Themes, Change default SMS tone, Cool cydia apps like ToneFXs and others, LockCal, Able to clear out my email auto addresses. If any of these appeal to you then it's worth it, also if you don't like you can always go back it's not irreversible. Just remember to get all the info on JB and do it right. Once it's done you are not being protected by Apple's measures ie. Backgrounder - forget and leave alot of apps running and you could kill your battery fast, If you use OpenSSH always remember to turn it off when you're done with it because you leave your phone open to others and it also kills your battery real fast.