If you're used to roof prisms and/or a center focus wheels these will take some getting used to. First, the Auto Focus absolutely works as described. Adjust the diopters once (if needed from the default setting) and then let your eyes focus on the subject as you look around. This was the part I had to get accustomed to. Instinct is to reach up to the focus when changing ranges. With the Steiner AF you just need to wait a moment while your eyes adjust. Odd at first but quickly gotten used to. The CAT coating (with its ridiculously 90s-looking logo stuck on the side) seems to work well despite a slight rose-tinge in brighter light. I get VERY good depth perception and peering into darker sections of woods was easy and seemed every bit as bright as my naked eye.Second; if you're only familiar with the roof prism binos (or haven't used porros in a while) you'll realize there are a few tradeoffs. Porros are the older style but produce clearer images with wider fields of view (because the light passes through fewer prisms) BUT they are physically larger. This 8x30 is as large as (but much lighter than) my 10x40 Leupold roof prisms (when perpendicular to each other).Comfort-wise, with the open frame these carry like a set of roof prisms. The eye-cups are sized nicely (for me, anyway). There's plenty of adjustment in the hinge for different faces. I can hold them comfortably single or double handed for quite some time. Overall, these are a solid set of German-made optics at a reasonable price.