Ted, yes I have used red and orange filters and didn't like the results. With the red filter I got pale ghost-like skintones and white lips. With the orange filter the result was similar to Tech Pan without filter, pale skin and a face with two days old beard the person looked sick. At least in my eyes. The taste is different and how the filters will work depends of course on the light conditions.(posted 8329 days ago)Some day I will try Technical Pan with a cyan/bluegreen filter and develop with a catechol developer instead of the expensive Technidol. But for now, I'm happy with Efke films.
You're right about that some films are more forgiving than others, but that's true even with low and medium speed films. For instance, Efke R100 is much more forgiving than APX100.