Americas Best Value Inn - Downtown Phoenix
We stayed here for one night. Accomodation was much better than expected. Service was good, and the room was well appointed and clean. 
The price included transport from and back to Phoenix International airport.
Breakfast was basic but acceptable.
The staff were friendly and helpful.
Not in the best part of town, but only 5 minutes walk from the centre.
It's on Van Buren, which can be noisy.