If that is well designed and used within its limits, it looks like a great idea - for some people and for some situations. Yes, it is not damped. That can be good or bad. I wouldn't want it on the road but if I went back to riding gravel, it might be a real asset for me. (I have NFLoffensive lineman-like "loose brain syndrome". My made up term but all of those linemen would get instantly what I an talking about.)

Like anything - there is the engineering tradeoffs of strength, weight, cost and reliability. Once built and out there, someone will find a way to break it. At 150 pounds, I could probably abuse that for years. I've broken ti saddle rails but that was due to slamming the seat so far back the clamp was at the rail turn. Ride ender but otherwise no that big a deal. Now, using that device to do BMX style jumps on your road bike? Maybe not a good idea.