I had to download this and play through it really fast before leaving for college, and I made it to the end in just under three hours. Call me a fanboy, but this was a fantastic DLC; great variety in environments, excellent puzzles and stealth sequences, hilarious moments, excellent music that I don't remember hearing before that reminded me of the dotHack games...I could go on. And did I mention the -hilarious- moments? I'm a bigger fan of dialogue than combat, so this DLC was more attuned to my tastes than Legacy was.
I admit I wasn't expecting much from Tallis, as I'm ambivalent about Felicia Day, but I thought she was great and I really wish I could have kept her in my party afterward, but alas, she and my aggressive femHawke did not get along very well - I really hope she shows up in Dragon Age III. My Hawke fit perfectly into the scenario, as did Aveline and Merrill (who, by the way, played the role of Love Interest very well, much moreso than in Legacy). Not to mention Prosper, who was -such- a badass.
I'm waiting until the next time I return home (probably in three weeks) so I can sit down and slowly work my way through it and appreciate everything -- I had to skip all the Codex entries and some side-quests in order to finish it before I had to go, so I do feel like I was missing out on some potentially interesting tidbits.
And femHawke's outfit was okay, I thought. Looked good on my character at least, but like some people have said, I was secretly holding out for a dress a-la Stolen Memory. Perhaps a future Item Pack geared toward pure aesthetics for
me the fans who like playing dress-up with their Hawkes?

All in all, despite my very quick runthrough of it, I thought it was a great DLC. This will go very well with my Foppish Dandy sarcastic!Hawke...
(If I have to offer criticism...the Ghasts were annoying enemies. Not really difficult, just time-consuming to kill and not interesting to fight. Like
Mabaris Mabaries Mabari Mabarae.)