Hi, Ms Pep!
This may not be what you want to hear, but it may be of benefit to you and others, so here goes.
I am not familiar with that exact therapy, but did research many of the rapidly proliferating variety of alleged desensitization methods on offer. There is very little chance of evaluating their effectiveness, and many are appallingly expensive.
Since I have very little money, all the methods that required much cash were out of the question for me. There are three things that I have tried:
One was custom allergy shots. My kaiser Sr. Advantage personal physician referred me for this, so no extra money out of my pocket. It helped slightly with inhalant allergies, did nothing for
food sensitivities and MCS. Practitioner had claimed that her method would help all three, and she was listed with the appropriate medical societies. Took massive amounts of time [at least 18 months] to fool with this for little benefit. Would not recommend to others.
Another was self-administered and professionally administered NAET. [An energy based desensitization method] Again, I spent at least 18 months on it. This reduced the initial signs of chemical and other reactions, but not the delayed problems. Resulted in loosing my "early warning" symptoms that enable me to know when I should get away from exposures, so would stay around offending substances longer and get sicker for longer. Would not recommend this, either.
What worked best for me and was FREE, needed NO practitioner, NO fees for use, NO time wasted traveling to/from the practitioner was...AUT. This is a form of Urine Therapy. It greatly reduced both my inhalant and food issues in about SIX WEEKS! Did not help significantly with chemicals, though.
Am currently trying something called Guai therapy. Again, this can be self-administered at very low cost, tho not quite free, LOL! It is very likely to help many with MCS, especially if some of their symptoms would fit into descriptions of CFS/CFIDS and/or FMS/fibromyalgia. It is early days, as I have only been doing this for about 2 1/2 months, but my overall energy is better, metabolism has perked up, and I am a little bit less chemically sensitive.
I bring all this out in order to suggest that you keep in mind that what you are trying is not the only option. Decide how long of a trial you are willing to give it and/or how much money you are willing to spend and STICK TO IT!!! Beware of ANY practitioner who seems to keep stringing you along, who can not tell you about how long it should take to get better and how much it should cost.
THERE ARE ALWAYS OTHER OPTIONS OUT THERE, MAYBE BETTER, CHEAPER, QUICKER, MORE EFFECTIVE ONES!!!
Do please report back in as much detail as you are comfortable with about the details of your treatment and how it goes. That is the only way we all will learn what is working and what is not.
Keep seeking, applying, sharing accurate knowledge in order to
Keep seeking abundant life and joy!
Di