Dana Riddle tested it, and apparently was pleased with the results. It is a pretty good alternative to the only other ones available, the LiCor models are over a $grand$. The Apogee is a scientific sensor in a hobbyist housing
. I would loan it to other hobbyists by "hand transfer" only over shipping....although a weekend rental with shipping for $150 should cover things nicely.
I'd head right to your local reef club........