Excellent reply, jonpaulbaker. The visuals help so much!
I have not yet needed to tie anything down in my '10 SW/tdi. Hanging grocery bags is generally successful, with some failures. (The bags are just a bit too tall, and tend to rest on the floor, and come loose.)
My JSW came with a trunk liner, which makes it a bit tough to access the trunk compartments - I was quite pleasantly pleased when I discovered them a few days after I drove it home!