Thanks both for that matter, well done.
Darkfriend's opinion is brought a bit (too) strong and perhaps not looking at the whole picture, but if you read between his lines and skip some others, it aint that bad. like when he says "I'm going to advise against it's use if a person really wants to min/max."
For a large group (at least my warrior p.o.v.) AMR will do the job fine enough to be not that far of. The real top top (and i envy their knowledge) might do slightly better and is perhaps also needed in their guilds to beat HC modes asap.