You will always get people who have had bitter experiences with any number of schools, wherever they may be located, and similarly, you will also hear of rave reviews for others.
For what it's worth, I did my MEIR at AD in 2010 and only a short time after gained a FO position flying a twin turboprop with a UK operator. My employer didn't give a jot where I did my ratings, only that i had the blue licence and could reasonably fly an aeroplane as expected from a 250hr pilot!
By the way, I found AD fairly good, not perfect, but fairly good nonetheless.