I am trying the cinnamon extraction today. I filled my 30ml bootle only 1/2 way with ground cinnamon to start and followed the directions, exactly the same as for coffee extraction. The consistenct seemed to be very similar to the coffee extraction at this point, perhaps finer, less chunky, if that makes sense, because the cinnamon is more finely ground. It seems to be draining through the filter nicely, but slowly. I always let my coffee extractions drain at least overnight, so I'll see what I've got in the morning.
No one has mentioned which coffee filters they use. I use a recycled paper basket type filter, really inexpensive. I find that it drains far better than a cone type because there are no seams.
I'm going to try some cocoa extraction this afternoon, too.