I am interested in these 2 leather cases made by Kavaj: Berlin and Dallas. I am leaning toward the Berlin, but I have 2 concerns: 1) Without the rigid frame like the Dallas, would the iPad slip eventually and require regular adjustment? 2) Does the cover folds back flat and sticks to the back with strong magnets like Apple's silicon case and smart cover. I currently have Apple's silicon case and SmartCover. This combo is nice, and I love the fact that the cover would stick to the back when folded behind the case. But I always like feel of real leather, hence my interest in the Kavaj cases. I would appreciate it if you have some experience with either cases and would like to share.