The Good: Lasts and lasts
The Bad: Very soft cassette body
These came on a bike that I purchased in 2009, that previously existed as a demo bike. So, they have been, um, well-loved. I've ridden thousands of miles on them. I enjoy chunk and rocks, but do not send myself flying into the air. I rode this hub without doing anything, but spokes started breaking with alarming regularity. I rebuilt the wheel with new spokes, same hub. It is still spinning quite smoothly. I live in the wondrously dry southern California area, so I cannot say much about riding through bogs.
The down side is (and perhaps this is true for all hubs) that the aluminum freehub body gets notched by the cassette. Removing a cassette is an exercise in patience and willpower, plus having a variety of repurposed tools to remove the cassette.
I will continue to use these into the foreseeable future.