I used to use Efke films quite a bit 5-6 years ago. I used to feed my then recently acquired RZ67 with mostly the 100 and 50 speeds. I used Rodinal for developing. I never used a hardening fix but I did do a presoak and a water stop bath. Nice films, but shortly after getting used to them, I started reading about QC problems. Emulsions peeling away from the base, pin holes (caused by a acid stop perhaps?), poor backing paper resulting in light leaks etc. I personally never had any of these problems, but enough people apparently did so I decided rather then take any chances, I better go with a company well known for consistent quality. I went with Ilford and have made Pan F+ my most used 120 film.
Having long ago ran out of my stash of APX 100, I have been thinking of giving Efke/Adox 100 another try. How has the QC and consistence been the past several years?