For years I've used KRST 1:9 up to 1:19 for minutes and more minutes and have never felt I got what I thought was the right look. Then I read a piece from Carnie using KRST 1:5 for 45 seconds..... Well, I tried that too.
(ooops... somehow I posted in mid composition)
I think I, and probably others, who were not satisified with KRST results were missing the transformation and looking at the final product as not different from the origional. Too long staring at what had already changed to see the difference.