Although a bugged Sylvanas f-ed us in the end, i still think it was an awesome raid! To all concerned, i think you can agree.
Angeldusters here, speaking. But the leader and creator of all this is HASASHI. All should bown down to this king and pay their respects, no doubt about it.
First of congratz to your achievement even though i'm horde >:)
Second: Sadly these achievements are (imo) too easy to get and a little too hard on the other side.
-Too easy because usually the other faction can't organise quick enough if noone from your raid warns them and u can mostly kill the boss before they are < 10 people to defend it. (For example we did the Stormwind King this weekend on ragnaros with a 25ppl raid and 'only' 3 heals). Especially those in rather empty cities like undercity/darnassus.
-Too hard because the stupid city guards hit you for 5k+ and there tend to be multiple of them on the way towards the boss.
Nevertheless: Thumbs up to any world pvp activities :)