$200 pulse oximeter for monitoring your oxygen saturation

I came across what looks like a really nifty pulse oximeter:

http://www.scantechmedical.com/spo_medical.htm

At $200US, there seems to be little excuse not to have one when flying
with oxygen. Has anyone used one, or have more information on it than at
this web site?

I think the Minolta Pulsox-3 is still the most desirable overall,
especially for winter wave flying where the pilot is wearing gloves, but
the cheapest I can find it is still $499US.
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Eric Greenwell
Washington State
USA