i'm staying at the sheraton delfina santa monica right now. I don't know if this used to be the 4 points santa monica, but i think it is quite nice. much better than the westin LAX.
the sheraton delfina has a W vibe (electronic music, "hip" decor). I got a great upgrade to a nice suite on the third floor. The fitness center is nice with the tv's connected to the ellipticals/treadmills, good set of weights and machines.
westin LAX looks very old and tired.