I gave this instance a go on heroic, but the tank with me was a DK which was still very undergeared. We wiped on the ethereal boss (was second for us, corehound as a first boss wasn't a problem.), I think we just kept going the wrong way tbh, and we got teleported a few times, plus too much dps on the tank and little time to stand still and heal+dps. I dunno, will need a good geared tank for it or not worth going.