FWIW, the Patriot form factor of the Caliber has 23 cu ft of cargo with seats up, and 53 cu ft with them down. Seems small until you realize it comes with a roof rack. Haven't found anything I wanted to haul that didn't fit.
Looks like it gained an inch of ride height and some interior chintz over my 08 model, so it may not be the same car any more. Ours gets great gas mileage, is quite reliable, roomy and as I said fun to flog around. Haven't taken it off road, but I have the wrangler for that.
That said, while I had the mustang insured this summer my 2.5 year old and 4.5 year old would NOT let me drive either jeep. They'd run out to the garage and climb in the mustang while I was getting ready every time. So opinions on the Patriot's fun factor do vary.