This works out to 341 prototypes a year. I understand this is based on a true story and it's probably a good vacuum cleaner, but - c'mon, give me a little break here.
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Worth adding - I was buying a vacuum for myself not long ago and looked at Dyson. Their marketing materials are full of exaggerations, inaccuracies and half-truths. One of their central claims is that their vacuums "do not loose suction". A reasonable question here is what happens when a dust canister fills up? Does it keep sucking dust and ejecting it back into the air? They also claim it is the only cyclonic vacuum (followed by some fine print), and this is simply not true.
All in all, it is really well marketed, but otherwise severly overpriced vacuum of an average manufacturing quality (can't lift certain portable models by their carrying handle, because some seal opens up and, ironically, they loose suction) and it was designed by an interesting person. That's about it.