We had a good experience at the Beverly Hills Marriott, overall. However, getting the room we needed was a frustrating experience in the following ways:

1. Marriott's website is hit or miss in regard to mobility accessible hotel rooms. Sometimes the information is accurate. Sometimes it is contradictory (e.g., saying that a single hotel room has a roll-in shower and a bathtub when it is really one or the other but there is no way to tell which). Sometimes there's no information.
2. Whenever I have tried to book a room with points or a rewards certificate, a message has appeared that said "You can choose an accessible room later," but it doesn't actually provide that option.
3. Sometimes a confirmation email will say that a mobility-accessible room is guaranteed. Other times it says it's not guaranteed. What is the point of reserving a mobility-accessible room if it's not guaranteed? If I can't get a wheelchair-accessible room, I can't stay at the hotel! When will Marriott start treating accessibility like a requirement (legal and otherwise) instead of an amenity?
4. In light of 1-3, I knew I would need to call to make a reservation at this hotel with points. The person I spoke with said that she made sure a specific mobility-accessible room with a bathtub would be assigned to us. (Room 411) (The actual room was 329 though.)
5. Again, due to previous experiences with hotels, I called the front desk of the Beverly Hills Marriott to confirm that they have wheelchair-accessible rooms with bathtubs and that one would be available for the night we needed it. The person I spoke with told me that they don't have any wheelchair-accessible rooms with bathtubs.
6. I called the front desk again later to ask follow-up questions and come up with a new plan of action. The person who answered the phone this time said they do have wheelchair-accessible rooms with bathtubs.
7. When we arrived, the first person we spoke with at the front desk said they do not have wheelchair-accessible rooms with bathtubs. I told her that other employees had assured me that they do. She told us again that they don't. I asked if she could find us the type of room we needed at another Marriott location in the area. Then she told us she would check with someone else at the hotel to make sure they don't have any wheelchair-accessible rooms with bathtubs. Surprise! They DO have a wheelchair-accessible room with a bathtub! She told us there is exactly one in the hotel.
8. When my husband asked about using the lift for the pool, he was told that they don't have a lift. Since we saw that there was a lift for the pool and the hot tub, he told the employee that they do. Eventually, that employee said that Mr. Allen could help. He got a battery for the lift and helped us to use it.

So, we did get the accessibility features that we needed, but it was a real ordeal to get them. There is so much room for improvement here, Marriott!!!

The room itself: The bathroom was great. There was room to maneuver my wheelchair. The bathtub side was low. There was good water pressure and temperature, and there were grab bars by the toilet and bathtub. The shampoo, conditioner, and body wash on the wall would be impossible for anyone to reach while taking a bath unless they could stand up. I brought my own so this wasn't an issue for me, but I'm mentioning as an FYI.

The room was small, but there was adequate room to maneuver my wheelchair. The bed was very comfortable. As others have mentioned, we heard traffic noise from the street down below. I was surprised how loud it was and how many cars were on the road at 4:00am. I brought a white noise machine and wore ear plugs, which helped some.