It’s been years (about 25) since I got a day room at LAX so I can’t offer you any reviews but I do know there are plenty. The key is to get a hotel that has a free shuttle from LAX. The Travelodge used to be the go to place but it has shut although there are still a couple in the area with shuttles.
There are plenty of options though under the Marriott, Hilton and Hyatt banners. I can’t give you reviews as I’ve only noticed the various shuttles recently but google day use rooms LAX or similar and plenty of options will show up. You could even just use google maps to see which are closest. You’ll see they are all offsite but close by.
Expect to pay about US$100 give or take for a room with check in around 7am to 9am and check out between 5pm and 8pm. Many are just available as a walk in, some don’t even take bookings for day use rooms but availability is usually not an issue.