I've only read two: Aerie of the Crow God, which was said by many people here to be one of their best (at the time, anyway) and Shadows in Freeport, which I bought for my love of Freeport, and which I hadn't heard any advance word. I thought Aerie was good enough, with a descent enough adventure locale and interesting challenges. It was the reprint, so it was bundled with a sequel adventure, which was fair. I felt Shadows was very bad: an uninteresting and illogical dungeon crawl. On top of that, it had nothing to do with Freeport, pirates, or anything vaguely reminiscent of what I expected from a "Freeport" module, so I felt mislead and ripped off. Given that history, I don't really think the DCC line is for me. I might pick one up in a discount bin sometime and give them another try, but I'm not running out to get any more. I tend to like Dungeon (magazine) adventures a lot better, though, so your tastes might not match mine.
~Qualidar~