Digital BW, The Print

I've thought of purchasing the isoX noise reduction PS action for 
ocassional use on my BW images. (It only costs $15.) I was originally 
written for digital cameras, but since it's a PS action it should be 
applicable to any digital image being processed through PS. That 
doesn't mean, however, that it will work with BW, although it could 
of course be used with color images that would later be converted to 
BW. Anyone have experience using this action -- either with color or 
BW? 

Chris Hargens