> The sensor is applied to the back of the upper arm with a simple, disposable device called an applicator. When the sensor is applied, a small (5mm) filament is inserted just under the skin, and held in place with a small adhesive pad.
'Inserted just under the skin' means it's still invasive, but that sounds nicer than regular needle-sticks so perhaps 'less-invasive' would be a more accurate description.
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.
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.
I prefer "minimally invasive"... You can't just remove the device and stick it back on, but it's good enough that a truly non-invasive device would be a marginal improvement for me.