Not sure about what you mean by ISF data, but there is no BG data continuously collected with the base model, unless it is facing the sensor at a short distance.
Yes. Without the waving, there is no reading 
Well: it is not so much the waving as the distance. If it is within the right distance, it will collect the data.
I mean BG data (although, let’s face it, Dexcom, Libre I think are all measuring the interstitial fluid, not the true BG).
With the Dexcom, the sensor transmitter needed to be nearby.
Ah,now I understand 
I thought you meant ISF as Insulin Sensitivity Factor: I was confused…
You are right The Libre spec is that the reader should be less than 4 cm away from the sensor when reading: https://www.freestyle.abbott/ca/en/products/libre/faqs.html
One thing i like about the FSL is that i can scan it right through layers of clothing and still get a good reading. dont know how it actually does this, but it does and its convienient. I keep it next to me while i sleep. i like that it doesnt have alarms the way that the dex does. i set my alarm clock next to me every night so that i wake up for intervals to do finger sticks. i know this may sound horride to many of you, but it works for me, and i dont mind the 30 seconds it takes me to wake up, test, and then go back to sleep. This way, i wake up in the morning for bfast with few suprizes. Phew. 