I haven't played or run it, but have the 4e releases so far. My take from a read:
Plot/ Mix of situations: A. Great job of different locations and mix of objectives. Not a dungeon crawl. The PCs have the opportunity to escape from a besieged city, do wilderness adventure stuff, get involved in country wide politics, spend time in a port city, war level skirmishes, etc.
Combat encounters: B/B-. Some of the combat encounters are not very dynamic and don't make full use of 4e strengths. The modules also suffer from too many combats (like all published adventures). I would love it if someone bucked the trend, and focused on making 1/2 the combat encounters per level but making them really good, and just awarding story XP to make up the difference.
Skill challenges: F. The execution is not horrible, but none of the success/failure consequences of the skill challenges I remember actually make much difference to the story.