"O. Sami Saydjari" writes:

2. Does anyone have experience with Oximeters like this?

I wouldn't want to fly (typically) without one anymore.

What values do
you see at the higher altiutudes (non-cabin pressure aircraft...just
supplemental oxygen).

It varies considerably by person. My wife can stay at a higher
saturation level (than me) using with much less flow. She gets
impaired at higher levels though. Go figure.

I think you're right to test yourself.

--kyler