Mike,
Its useless, unless you are trying to measure change, such as bulb life. Then it works, for just that, figuring out when to change bulbs, but its about worthless if you get a coral from a friend with a Quantum meter, and he tells you stick it under 400 par, then you take it home and use a non standard Senseye to give it "400" par.
Im really curious to see what they say, if it truely is a quantum meter, count me in.