In case you wanted a less biased opinion...
The War of the Burning Sky AP is, hands down, the best campaign/setting I have ever had the pleasure of running... altho Deserts of Desolation is definately in the same sphere.
IMHO, the best part of the campaign is how much closer it is to a setting with a strong plotline instead of a series of loosely connected stories. This means the DM has more room to allow the players to wander off the main storyline.. or completely re-organize it, while still having a published resource to work from.
The second best part of the campaign is how strongly linked it is from 1st level to 30th {or 20th if you are playing 3x} while not putting a straight jacket on the players. There are characters you meet in the first module that you run into again later, and your interaction with them can change how they deal with you the next time you meet.
At the end of the campaign there is a large battle, in which the success or failure of the PCs in the previous modules shape the challenge they face significantly...
It is an "experienced DM" campaign as you are not
Shackled to a particular plotline and many of the later modules are written fairly vaguely in regards to the interactions or background reasons. For instance, there is an assasination plot that happens before the PCs show up in one adventure... but it is not detailed who was behind the plot or how it was executed. If the players investigate, it is up to the DM to put the best story forward.
The assasination plot is itself not intrinsincly linked to the full plot, which is part of why it is not detailed.. but that means it is easier to adapt to the nature of the party.
The third reason I love the campaign is this forum. Seriously... how many other APs do you know that you can literally ask the authors for help? There are also a number of non-author types {like me} that respond here and have posted a bunch of threads on implementing the campaign in various settings and concerns.
I am running a converted 4e version and have been enjoying it very much. If I had stuck with 3x, I would have gone for the full color hardback.. which would have been cheaper than my current subscription + Lulu + Kinko's approach