I find they work well under certain conditions, but I wouldn't use them for hunting rough terrain or as a work boot. I also found that the wool innersoles make a big difference.
To get a good fit, I ended up with different sizes for each foot. Bought a nearly new pair off e-bay, and mixed the pairs. You can also accomplish this by getting new bottoms for one boot. They can go up or down one size with this.
Paul