I was enthralled with Efke PL100 until I tried 400TMax. I burned through my first 50 sheet box of 4x5 in a week. (And I have a regular 9-5 job.) I sold the unopened box of Efke PL100 8 X 10 that I had to George Provost and gave away the rest. Now I, like Jorge, use nothing else. (Jorge, where do you get 12 x 20 TMY?) How sad that they don't make this film in larger sizes.
I know it's expensive. With film, just like with everything else, you get what you pay for.