I stay at Four Seasons all over the US for business and pleasure, and the Beverly Wilshire stands up there as one of the top 3. After staying at the hotel on business 3-4 times a year, they have really upped their already world class service with a personal escort to my room and a no check in policy. I started bringing my family here for years, and the service is unreal. We've gotten cribs, extra refridgerators and microwaves brought to the room swiftly when needed.
Rooms are somewhat small for families but very large for individuals. Their suites are much bigger and recommended. Also the pool and fitness club are awesome.
Also, the food at the hotel is delightful. The breakfast at the hotel is simply fantastic, albeit at Four Seasons prices.
If you are looking for a beautiful hotel in LA with great people watching and lots of celebrity guests, this is your #1 destination.