Three things that look, at least, like weaknesses :
- in their advertising video, at several moments, we can see the light is passing thru the hood (which is not expected for a hood)
- we also can see the hood can twist easily quite a lot when you move your camera : won't it just cover a part of the image circle when shooting fast moving subjects, especially if the hood is expanded to its greatest shape on telephoto lenses (i.e. mostly when shooting sport, BIF...) ?
- overall, this thing looks too much flexible to be able to protect a lens efficiently (what a regular lens hood can do most of the time)
Whatever is pretended in their well produced video, it really looks like a subpar concept, sorry.