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Per the people I know who have tried it, including the author of this post, it's totally painless. One can debate whether or not a filament you can't feel is invasive, but for all practical purposes it's the same as no filament.

For clarity: the measurement you pasted is the length of the filament. The width/thickness is ridiculously tiny. Basically, this product has the same UX as a nicotine patch.

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From a design perspective definitely invasive. Design strategies and regulations change greatly for products which penetrate the skin. But you are correct in that it is a patient friendly device without the associated burden of lost invasive devices.

From an FDA perspective invasive also. Otherwise you wouldn't need a prescription.

I have a Guardian 3 sensor from Medtronic, which I've been using for about a year. The initial insertion isn't "painful", but can definitely be uncomfortable, and there might be a bit of blood that leaks into the sensor cavity. Once it is in, there is no discomfort.

The adhesive tape which is needed to attach it to your skin is actually more uncomfortable than the sensor.

Combined with a 670G pump it has been a huge benefit for me. My A1C of 9.0 is now down in the 6's. My pump broke while I was on vacation for a week, and my control was clearly worse with pens and finger sticks than the pump and sensor.

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