[crainger]

Hells yeah. They overheat your gun like crazy and are usless on pistols and Assault rifles, but on the sniper, with decent sniping skills (Infiltrator with Commando prestige) most bosses will go down in a few well places shots (if you take the shields down with overload and use Assassination), even quicker if you setup Garrus the same way. Due to the overheat, you might have to stall the boss with Sabotage or find strong cover.