I really liked it because I went the exact opposite of how it's supposed to be beaten. Played as a Githyanki Barbarian and just went full ape mode on the automaton. Took some time to smash, but was really fun ^^
Because otherwise it's not really a boss fight like the Bulette or the Hag if done the way it is meant to be done, but that isn't an issue since it is clearly there for those who wish to do it properly. Not to mention the in-game lore states the automaton being impenetrable.
But as far as expectations go... I don't know, I felt like I got exactly as was described by the three Drows.