I own them all and just completed running the second one.
Mansion of Shadows was dripping with atmosphere. Unfortunately, it can be a TPK if you aren't careful. Like an above poster said, there's little reason to investigate the house if the PCs were invited (there's only an hour until the dinner scene, and after, little reason to wander aimlessly). Two in my group wandered off just out of curiosity and got killed (luckily, I was able to work in replacements through the "village option").
I expected Beyond the Towers to be a simple dungeon crawl, and it started off rather atmospheric as well. Unfortunately, as has been noted, the map and key missed an editorial pass. My group entered through the lowest level, which meant that they encountered the most interesting stuff first. I was able to get a lot of fun mileage out of the bandit group.
Overall, I was happy with Mansion and satisfied with Towers. I do plan on running through the others as part of my Freeport/Bleeding Edge campaign.
Walt