B/W Styler allows me to think and work in B&W, not PhotoShop, not in some abstract mathematical way, but as film, development time and paper grades.
To illustrate the impact for B/W Styler I am including both the color shot and then the converted shot. The only difference between the two images of each set is one is color and the other is B&W. All pre-processing, such as cropping and color correction was completed prior to doing any B&W work to provide an even basis for comparison.
This first two sets were processed as Tri-X @ 800 ISO (IIRC) with long development time and #4 contrast paper. A green lens filter effect was also added.
Color:

B&W:

Color:

B&W:

This set of images were processed as Plus-X shot at ISO 200 with long development time and #4 grade paper, adding in a blue filter.
Color:

B&W:

I'll have to say I'm impressed with B/W Styler and the $50 spent feels to be well spent. There is a free trial of the software but it does put LOTS of notices on the converted image making it unusable. It does not prevent you from playing with it and seeing if it fits your workflow; you just can't use the finished, converted image.

Enjoy,

