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Yes or no in a 2000 point army.
Only if you are either a magic heavy chaos (tzeentch+fire magic with horrors maybe) or if the opponent has a firing line.
Elsewhere you could find yourself not shooting since you could hit your units that rush forward!
Also, 2 rare choices means no spawns...that's bad. And the cannon costs XXX !!!!
It could turn the tide of a battle though, since it does massive damage+panic+it's hard as a daemon to take out+it can be a cc unit (LOL it's chaos itself bound in chains)
It's better, it's shiny, it's warped...it's Chaos.