dude, annihilation is much less buggy than Panic. Panic contains more features though but like what the top guy said, u gotta know how to use it. Panic is known to crash at certain sometimes and it makes u look like u got crashed but it's actually the hack.
I do recommend inhale or zypher if you're noob and just want to play with little hacks; basically having fun the same time
annhilation if you're medium and u really want some hacking
and panic if you just want to dam hack off the game and piss everyone off while playing :o