I have a 2009 5-speed Yaris and it now has 70,000 miles on it. The WORST gas mileage I ever got was 38 mpg on a highway trip against a brutal north wind. The EPA rates it at 29/36 which makes me wonder if they ever caught the thief who was siphoning gas out of their test car.
I usually get between 40 and 45 mpg with 43 being the most common.
So far, completely reliable, nothing but scheduled maintenance.
It is what it is, a bare bone basic transportation compact car. The road noise is a little high but the engine is pretty quiet.