Wow !!! I didn't expect such a response to my post... I used XP-2 and Kodak CN attending workshops on documentary photography in the analog era, Charles Harbut and Mary Ellen Mark taught using this materials, make easier to judge the pupils progress.
As I pointed at the beginning of this thread, I'll shoot a roll at the manufacturer specifications, 400 asa, and send it to my favorite lab. The lab used to be the most important decision, due to the proliferation of minilabs at that time, there were a bunch of very lousy, bad processing, and that was one of the main reasons for the discredit of the film, the people runing the machines didn't understand that the prints must be monochrome.