I am too lazy to upload pics but my first cook consisted of 15 lit coals in the bottom a load of used coal and some lump on that.
I was smoking brats first so I had to keep it low under 200. I was very impressed with the ability to keep the temp, probably a combination of the kettle, the water and the S n S but once I set a temp it stayed for a long time. After that I dialed up the temp for some poppers, very responsive to vent adjustment again, I am not giving the SnS all the credit, I think the kettle itself played a role. That said, I am really going to like this thing.
I would like to test the 4 hours on a quart theory from what I saw, I am not so sure.