I've taken the test and recommend it. It is excellent to check on your baseline or your progress. Also, if you have the right doctor, he or she will know whether you are "spilling" Iodine or not. Spilling means your Iodine absorption mechanism is damaged.

"Spillers" typically score high (false negatives for insufficiency) in the presence of breast, thyroid or other diseases.
They need to take more Iodine and retest in three months. The score should go down as the test begins to reflect lack of spilling.

Three months later the score should go up to a more desirable range.

One woman who had taken 50 mg Lugol's for two years scored very, very low. She switched to Iodoral and will retest. Another was on Atomidine and did not do well.

Good luck!