This film needs a LOT of light. It took 3 rolls to really dial it in. This film curls like crazy! Thank god I can keep a cool head while I have a curled up roll in one hand and the 120 reel in the other. Thank god the substrate is flexible enough to handle the loading cycle. Did a 18 minute stand development using Rodinal 1:100 on a scene that was 10 stops and it worked! It took a 16 second exposure. Of course this is because I was using a 75 Nikkor SW with a CF IIIB and a #11 filter. The format is a 6x17 Shen-Hao. I find that ISO 12 is more realistic. Just picked up a case (10 sealed bricks 07/2005) and it wasn't cheap. I have a d800E with some great lenses but the 6x17 is a mind bender. I love the format and this particular camera is wonderful. The whole rig with 75 nikkor, 110XL, 210S-S with filters, film holder, camera, and accessories fit perfectly in my backpack and it's light! Wahoo! Any commentary or experience with APX 25 is welcome!