Tom,
I have only used the Ultrafine Xtreme 100 35mm 100ft and it's a very good film and the price is certainly cheap enough. Slightly grainy, but not that bad. The one nice thing is that it's emulsion has no defects that I can find and after it's processed it lies as flat as a board. Now, the 120 film in ISO 100 is a different horror story. If you want to try junk film that's the one to try. I won't buy it again, PERIOD! Now there is another 120 100 speed film called Ultrafine Xtreme that's suppose to be different. Haven't tried that yet and I won't until I hear other folks comment on it. JohnW