I tried it yesterday, and my first impression was "underwhelmed." I definitely don't feel that way about 3.2 as a whole, but the instance itself seems less than impressive, a one-room fight with almost as many boring moments as there are exciting ones. The fights themselves are actually pretty commonplace for a Heroic -- the jousting fight is probably the least-liked among the playerbase (seriously, whoever really loves the jousting mechanic over at Blizzard needs to take a good long look in the mirror for some self reflection), while the best is of course the Argent Confessor, who summons a random figure from our "past memories" to fight. I got Illidan and Onyxia the first few times I ran the instance, but of course Hogger and Van Cleef and Heigan the Unclean also have a chance at making an appearance. I did like the fight, but I was kind of bummed the old memories didn't bring any of their abilities with them -- they all have the same three abilities to throw at the group.