I agree with NCRBILL. The HGI-LAX is the best. The free internet, and their "University" section makes this hotel awesome, especially when you consider you can get rates for $79.

The pool is nice, and they added a weight machine to the exercise room. ^ It's in a low traffic area, so there's no significant noise. The bathrooms are always super clean.

If it wasn't for me doing my mattress-runs when in LAX, I would stay there every night. I usually do HGI-DoubleTree-HGI to add towards my status.