Nobody should like GM's, they are hard, but that is why they work. They put you at just about the worst possible mechanical dissadvantage possible.

Wouldn't be great with back problems, but then again done correctly it could be a good rehab tool.

Mostly I was thinking that if the ITB irritation came while squatting, that chances are anything that required moving the knee through a ROM would be just as likely to irritate it. That pretty much eliminates everything but GM's. I like box squats and GHR's, but chances are they would be jsut as brutal on any potential injury.