Sorry I missed this buddy.
The films are a monocrystalline Diamond , making them slightly slower than a comparable polycrystalline emulsion. However the films can handle back and forth strokes down to about the 1u level , so you can go a lot longer before going to stropping only strokes.
The films got a bad rap around here because the first batch didn't hold up very well. They have undergone through a myriad of improvements making them much more durable. I feel they are a cost effective solution to dealing with high carbide wear resistant steels. They destroy the shaptons in this area , working much more quickly , they also start polishing much sooner , around 1k as opposed to 5k on my pro stones.
Im going to be doing some comparative testing here looking at the 140 atoma vs the 165u film , having used both extensively I think I kn ow which is going to get the nod but.......