Fair for one night, not much to expect.
We stayed at the La Quinta Inn & Suites LAX for one night in april 2012 at the end of our trip in the West, just before an early morning flight. We booked a room with two queen beds for two adults and one kid. 
Our room was pleasant : bright and quite new with a 70s feeling but with not much amenities (flat screen TV and free Wi-Fi but no fridge or microwave). The bathroom was clean and in good condition. 
We didn’t test the breakfast as we left the hotel at 5.00 am nor the outdoor pool.
This La Quinta is located near the airport, just a short drive to the rental car returns. There is a brand new McDonald’s, very clean, next door.
We have mixed feelings about our stay : the room was ok but we had minor disappointments : we were surprised to have to pay the parking for the night (15$) as we got no information about it when we booked the room, plus, there are only two elevators and very slow ones, it’s not great for an airport hotel…
In short, an ordinary stay. Rather 3.5/5.