Should I jailbreak my phone?
If you jailbreak your phone and have insurance your plan will no longer cover it so if you break your phone you will have to pay full price to get a new one unless you go to a kiosk in the mall that fixes phones..
up to you
I wouldn't unless i knew a lot about security. You are giving up your phone's security system.
sometimes it makes your phone lag and run slow. depending on what jailbreak you use