No canine passengers in our "09, but we are considering buying the subie gate to prevent cargo spillover into the rear seat area. Not often do we have to pile stuff that high, but on vacation yeah, we will, and our daughters prolly wouldn't appreciate being buried under pillows , towels, boogie boards, etc. in the event of a sudden stop (the light stuff goes on top, of course. And yeah, we do have a cargo box on top of the car).
The nice thing about the subie divider, as noted by someone else here, is that it bolts in solid. So in a sudden stop it's not likely to be knocked over by a six pack of charmin...or a golden retriever.
We've been quoted $299. for the divider by our dealer...not including installation, which the parts guy said is not difficult to diy.
09 2.5X AT