The Das Schild prevents a single sharp edge from poking a dent UP into your hood, and it takes up less space than any thickness of wool blanket that could attempt to do as much. It doesn't reduce cargo volume in any meaningful way. Not like a wool blanket does.
I have even moved mine from one car to another in about 5 minutes.
What can't be done with a combination of a wool blanket, duct tape, large plastic trash bags, zip ties, and a roll of paper towels? Huh, McZataraguyver?
But seriously, folks.... I really struggled with the dreaded trunk thump for a couple months. It was the worst problem I had with the car. I've solved it finally.
1. Remove the liner in the hatch (see the article) and change put some o-rings top and bottom of the weight that's suspended under there. I tried the foam strips and didn't like the result, but the o-rings did it.
2. Pull the plastic off the rear starting behind the passenger side tail light and working to the middle. The point of this is to expose the lock mechanism for the hatch. The lock is screwed down to the chassis with two bolts that go in oversized holes in the lock housing. One of my bolts was loose and the lock on that side had moved all the way to the loose side. I put both side down tight all the way and put lock-tite on both bolts before replacing them. There is also an article on this process. Read before you start digging.
There are two rubber bumpers at the bottom corners of the hatch door. They are threaded so you can adjust the height of them. Screw them IN a bit after you do this lock thing. You want the hatch to be tight against them but not bending the hatch tight. My hatch now requires a firm push or a drop with a little extra push (light slam?) to close. My passenger's window opens about 3" with the hatch to allow air out so I don't blow any windows or pop eardrums.
3. If you open the hatch and look on the sides of the opening, you'll see a small band of clear tape a bit more than halfway up on each side. I put some of that foam tape that I bought for the hatch weight on that and some more of it on the little rubber bump stop on the hatch that contacts that area when the hatch closes. So both sides now have extra foamy bits hitting each other.
Of the three, I'd say the tightening of the lock did the most good, but each of these improved the noise for different conditions.
No blankets required.
The front trunk, where Das Schild is supposed to go, is not a source for noise in my car. As this is supposed to be a sports car, I'd think adding weight with things like trunk liners would be sort of counterproductive, but I guess it depends on what you use your Cayman for.