I am structural engg and architect.We were using AAC blocks for last 5-7 years.
We have faced severe problems now. I seen that vertical and horizontal cracks are formed in wall and plaster also leaving the blocks. We have used all brands AAC blocks from Hyderabad, Nashik , Pune, Surat etc. Also in damped conditions specially in rainy seasons it gives heavy seepage inside and also the tightening of plaster with blocks weekens with time. I strongly not recommend AAC blocks. Its rather much much better to use CLC light weight blocks which are much better.