There’s no BSAS bootcamp for level 3 (atleast not until this year)- only the weekly review course which runs from Jan to May. I did that this year and still got kicked in the teeth. I went fully prepared for every class after doing the readings and completing the EOC questions.
In retrospect, I think, though the instructors did a reasonable job, they did sort of send a message that the test’s easier than it was actually. Also they dont go through the material in any level of depth that’s required for the exam.
Overall, the classes were nothing phenomenal and on the negative side it may have led to some overconfidence(atleast for me). I did not use any classes for level 1 or 2 (though I did the BSAS bootcamp for level 2 which was terrible) and was pretty nervous when I took them but I passed comfortably. For level 3, I went in with full confidence having prepared much more than usual, came out feeling good and failed gloriously with band 9.