The good: Very close to LAX, free shuttle, comfy bed and quite AC system.
The bad: No short term guest check-in parking, self parking is not on-site and cost $14, almost forced valet parking for $28, out dated bathroom, slow drain in shower and no club lounge access as a gold spg member. Overall a very poor experience.
In the front of the hotel there are signage everywhere for valet parking ONLY. There is nowhere to stop for short term guest check-in. Self parking is in airport parking lot behind and across the street, not onsite. At check-in I asked for club lounge access and was told because they are fully booked it was being reserved for platinum SPG members only. As a gold member this was a total slap in the face. After a shower I was standing in 2" or more of water because the slow drain.
I will look for other options such as the Westin the next time in LA. We also stayed at the Sheraton Mission Valley San Diego Hotel on this trip and the experience as a Gold SPG member was night and day. The Mission Valley location had a printed list of SPG gold benefit while staying at their hotel including club level room, club lounge access, late check-out, free internet, etc ... and a welcome bag with bottled water and chip. So if you book the Sheraton Gateway because of the Gold SPG benefits you might not get them. Good luck.
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