Efke 25 is my favorite film. I have been using it for about 1 year now in 120, and got some 4x5 over the summer. I didn't like it in Pyro to much, but love it in Rodinal @ 1:50.
You guys in the postcard exchange, my first postcard "weeds" was shot on Efke 25 with no filter in Rodinal.
Aggie, bring some empty film holders on Tuesday and I will bring a box of the Efke 25 4x5 you can load up and try out.