So I selected "economy" as the renta car type, and sure enough, I get a Chevy Aveo sedan (not the hatchback). Drove it for a week. A singularly unimpressive little econobox. Not that there is anything truly wrong with it, it seats four grownups and has a trunk big enough to take four "fit-in-airline-overhead-rack" bags. The radio and the air conditioner work.
On the down side, the styling is somewhere between utilitarian and downright ugly. It's tall, and feels tippy on the highway. The engine is puny and loud. Gas mileage was 27 in mixed thruway city driving. My Caddy Deville used to get 27 on the highway, the old VW Beetle would do 30, and a Subaru will do 32. Seems a shame not to get world class gas mileage in return for giving up size and comfort. In daylight it is difficult to impossible to tell what gear it's in. After dark the tranny shifter is illuminated and you can see whether you are in R for reverse or D for Drive, but in daylight, forget it.
Upon return, my Mercury Grand Marquis felt so quiet and so comfortable after a week in the cramped and noisy Aveo.
Chevy is asking $12K base for this thing and $15K with options. For less money than that you can get a much nicer used car.