I used AATBS to prep for the California MFT licensing exam. I unfortunately failed the Written Exam (1st of 2 exams) twice. You only get a 90 day access to their online practice tests, which then you need to continue to pay for another 90 days. Unlike Gerry Grossman's Company who provides access to his practice exams for a year or until you pass.
Also AATBS provides a money back guarantee if you don't pass the exam, however, no where in the invoice that accompanied the study materials do they state that you must complete ALL 15 practice exams online to qualify for a full refund. You really need to look for this disclaimer.
I decided to switch to Gerry Grossman the 3rd time around and PASSED!
I also have a friend who went with Gerry Grossman for the written and passed the 1st time around, but when she switched to AATBS for the Vignette Exam (2nd part) she failed and expressed how ill prepared she felt. She ended up going back to GG for the Vignette Exam.
GG really provides the support necessary to get through this process and has a high rate of passing the 1st time around. I wish I would have gone with GG for the first exam then it wouldn't have taken me this long (have to wait 6 months to retake the exam).
I would not recommend AATBS.