User blog comment:Sperez2012/What is YOUR favorite Mass Effect?/@comment-5337704-20120811084709/@comment-5607673-20120813195739

Thermal Clips aren't a setback. The weapons could take a pretty long while to cool off. During that time, you wouldn't be able to react to your enemies' attacks. With the thermal clips, you just remove the heat sink and add another. Then you can just start firing again.