After our trip to New Mexico and Colorado, I finally have come to fully appreciate the usefulness of the Tuffy Security Deck in my JK. With everything shown in the photo, I was still able to see out the rear window.
I added 4 tie-down points on the deck lid, and covered the top and side pouches with vinyl mats. There's a lot hidden in the photo, so here's a quick list of what fit behind the rear seat:
Under floor storage bin
Tool kit - wrenches, sockets, tape, zip ties, JB Weld, hack saw, hammer, etc
Bottom level
Ice chest
Foot locker with camping supplies (stove, dry food, propane, tablewear)
Propane lantern
Canteens
Sleeping bag
Upper Lid
Folding table
Footlocker with clothes
3 folding chairs
Sleeping bag
Air mattress
Blankets
Tuffy Deck Side Pockets
2 qts oil, brake fluid, PS fluid
Bungees
Jumper cables
Rope
Other mentionables
Hi-Lift attached to upper roll bar
Umbrella and axe attached to pet barrier
4-piece fly rod bungeed to the left roll bar
Of course, we had a few items in the back seat and floorboard next to my daughter's car seat, but all-in-all, I was very pleased with the amount of stuff that fit well into the JK.