Yeah, I don't get all the negativity. I can see people preferring something else, but all the bagging on Predator is just silly. They make a product that does what they say it does. This shaft is no different and I'm not at all surprised by its construction, looks about like what I'd expect. You should see the wall thickness of a multi-thousand dollar carbon bike frame....you'd be amazed how thin it can be in spots. It can take a whole lot of R&D and testing to find just the right wall thickness and I'm sure it was the same for the foam inside to tune the feel and weight of the shaft.
I finally got to hit a few balls with one of these yesterday at a tournament. Have to say I was impressed. Felt nice to me and was definitely super low deflection! It was a little different feeling than solid maple, but not as much as I expected it to be.