I'm playing in it right now, and I hate it.
The biggest issue for me is the guards at the Tower of War who take 25% of all your treasure. My character is a 9th level, but apparently these guards are too powerful for me to take in a fight, and the dwarf leading them totally outclasses me.
It's like the writer sat down and said to himself "What's the most obnoxious way to pointlessly annoy players I can think of? Oh, I know, unkillable uber-NPCs who steal their treasure!"
I don't even know or care why we're going into the Tower. I'm just waiting till I'm powerful enough to kill that stupid dwarf and his stupid men. I'll change alignment to chaotic evil if I have to, but I'm going to kill that dwarf.
The encounters are meh. I kind of hate how WOTC writes all of their encounters as if every player were a tactical expert and master character optimizer. My character is pretty optimized, and I'm pretty good with tactics, but the rest of the party is very suboptimal. My character is a 9th level human Knight optimized for meatshielding. The other characters are a 8th level human druid who is optimized but played incompetently, a 10th level human factotum who isn't optimized for anything but is played well, and the fourth is a 9th level ape-man (some race from oriental Adventures, starts with a V, sucks ass) wu-jen/spirit shaman/mystic theurge played by a stoner goofball, so he's useless to the power of inept.
At any rate, we basically get our ass kicked and use up all of our resources every single encounter, are forced to retreat, give a quarter of our treasure to the NPCs, and then have just enough money left to restock our healing potions before we go back in to get hammered some more.
Toben the Many mentioned the room with the grell. I survived that room. I didn't think it was awesome. I thought it was unbalanced, unfair, and nerve-wracking in a way that was totally not fun. Pretty much sums up the whole adventure.
We already finished Shattered Gates of Slaughtergard, which was the same nonsense. I don't think I've ran through an adventure WOTC has published yet that didn't seem heavily weighted towards completely unbalanced encounters that forced the 5-minute adventuring day.