I *almost* got my mountain bike to fit in the back. It was close but I didn't want to risk breaking anything on either my car or bike by closing the hatch.

Other than that, I've fit 2-3 weeks worth of groceries and a couple big shopping bags from from Target in the back.

Oh, and there was plenty of room when I packed a duffel bag, my camera bag, and my (now ex)GF's whole life into the back for a weekend trip to Chicago.