"It's interesting, but hard for me to get a sense of what the riding position would be like, it looks like you can't lean forward to use your back/glutes like you can on drop bars - and speaking of bars, the steering wheel is cute, but silly, no leverage, and you can't mount bells / lights / phone holders etc. as easily."

"Nope, if you click through on the link in the first paragraph to his site there's a draggable 3D rendering, the top is bumpy, no holes, but lots of lumps, you'd want to set a sheet of something flat on it."

"They look great, but the ergonomics seem suspect - at least they have some lever versions, but the plain ones would be hard to pull a door closed with - one-way knob...."

"Very cool, though even factoring in recovering the R&D costs, 700 Euros seems like a high price for a handsome chunk of plastic... I wonder if each one is effectively handmade by its creator..."

"Reasonable, though a collander seems like it would also let the ethylene "leak" out, or a wire basket, or a hanging mesh bag..."

"Not too far from a shooting stick (but the tripod base would be more stable). I would think sitting on one for any period of time would be uncomfortable, but they do nest up tightly, so I guess they're more for convenience of the venue than the sitters."

"Oho, it's a gimlet plus, that looks very useful."

"A very strong Close Encounters vibe, but I can see it would be much better than floodlights / flashlights / headlamps in the field."

"It's creative for sure, though rounded carbon-fiber 'knuckles' don't seem like they'd do a lot of damage (they should be plenty strong enough to carry a bag of groceries, at least)."

"Doesn't look technically too complex, quadcopters get their stability from spinning two rotors one direction, and the other two the opposite direction (diagonally), this design spins the upper rotor the opposite direction from the lower (easy to see in the dumping-water video clip) instead. The only not-off-the-shelf piece of engineering I see is the central shaft that couples  the two props plus motors to let the spin while staying connected."

"I want to believe? For the US, I wonder if it wouldn't be classed as a motorcycle (and thus require wearing a helmet...) and I wouldn't want to imagine what getting hit by a Rivian or other giant truck would do to the driver..."

"Within reason - imagine whittling away enough wood to only leave a long piece of graphite, like a few cm long - it'd break without the wood to support it."