What the strengths and the weaknesses of audio lingual method?

stregth
all the students are actives in the class
b.      The circumstance class are more interesting and life
c.       The speaking and listening skill are more drilled, so the pronunciation skill and listening skill are more controlled

weakneses
For the smart students this method is bored, because the procedure of the ALM method is majority repeat the sentence.
b.      Sometimes the students are confused because the teacher explain the material in simple way not in detail way.
c.       The grammar skill is not more drilled.