What I liked the most about HotU was its atmosphere, from beginning to end, especially the last part. Exploring the first level of the first dungeon, I felt I was being railroaded about as much as a lonely fish in the seven connected seas who have the whole world of water to swim in. I was a bit lost, and it was wonderful.
Of course, I didn't use automap, or any other map, and I used the camera in a way that didn't reveal much more than what the character would have seen. Absolutely fantastic. The bit of dialogue in the beginning about rumored shifting walls in the maze of the mad wizard was a nice touch that I bet most of you completely missed. You could read it by asking information about the maze from an old guy who was standing in one of the rooms of the tavern. It did more for the atmosphere than you would believe.
The middle part wasn't as good as the first and last parts; but the game as a whole was still a great experience. The music in the middle part was fabulous. Never expected to hear music like that in a game.
When I say one of the best RPGs, I mean simply ONE of the best RPGs, not the best, not the second best, just one of a group of an indefinite number of RPGs that I consider to belong to the group, which isn't great hype, since the group can include any number of RPGs, and RPGs in general, and almost without exception, are rather average if somewhat entertaining fluff.
But to be more specific, HotU is definitely one of the top twenty games, not just RPGs, in terms of the amount of fun I got out of it without any significant modding or weird larping.
So you didn't have as much fun with it as I did. I'm sorry you didn't. Next time, try to play it without the first crappy railroad walkthrough you can find on the 'net; try to play through it on your own before you start a thread on the 'dex asking questions such as "what would be a good character build" and "are there any things I should know before I start my power-gaming larping, uh, first play-through of this mediocre expansion?"