What is your normal type. B+W filters or other brands. If you are refering to the B+W non-slim version, then I'll say they are the same quality. If you are refering to other brands like Hoya, then I'll say B+W is one of the better brands.
its good if you are looking to use it with wide angle lenses that might be prone to vignetting... as it is thinner, it shades less light...at 17mm shouldn't make much diff even with aperture wide open...