Two weeks later and I still love running this dungeon on repeat. Here are the reasons it is the best dungeon ESO has released yet IMHO:
1. Meaningful boss mechanics on Normal mode forces PUGs to learn it so that come Vet mode they are actually trained to use them.
2. The mechanics don't feel laborious - they feel fast-paced and fun and intelligent. It's not like Maarselok where you sit there for ages on some of them trying to get the boss to progress.
3. All three sets are actually pretty viable and fun to use, making farming worthwhile.
4. The secret bosses means you can tailor your dungeon experience to take a little extra time if you want more drops and have a good group.
5. The plentiful chests mean you get more chances at collecting elusive set items. Especially since the secret bosses guarantee two more chests.
6. I can't get enough of grapple hooks. :-)