Even on the mall side where I was it was slightly noisy. Turn on the aircon/heating even if you don't need it and this overcomes the issue. Don't get the second or even third level if you can avoid them - sounds from people driving in and unloading May effect you if you are close to the middle of the building. Definitely get the mall side somewhere on/close to the edges.
After two flights totaling 20 hours from Melbourne, Australia via LAX I soon slept, only to awake the next morning to no hot water for a desperately needed shower. Ugh. Was fixed later that night, but hmmm.
Otherwise decent overall, with friendly service but not Sheraton standard at all. In Australia, this wouldn't even be allowed to be a Four Points, much less a Sheraton.More