The medium small 32oz Matte Black steel version is the one I got, I also have an older Medium 64oz obsidian (shiny) black one. The Lid on this new matte one is also tinted which is a nice touch, all blacked out!
Touch it with oily hands and It will show up though! So not sure how long it will stay beautiful. I guess that might happen with the shiny one too.
I also got a the Ceramic 32oz one which comes with a bamboo lid which is kinda nice (visually) and found the inner seal is NOT very tight, it's like they designed it too small and tried to make up for it with larger rubber gaskets, so it's easy to accidentally tilt and lose your seal. I think it looks beautiful but practicality and usefulness of the steel one is much better.
I haven't tried the glass or plastic versions.
I was thinking of getting the Atmos but I've heard a lot of people complain about those failing, so decided against it. Vacuum packing SHOULD technically be more effective for longer term storage / freshness but I've also heard people talking about the repeated vacuum causing the flavour of the beans to change negatively somehow, I'm not sure if there's any truth to that though (might make an interesting test). Removing 'MOST' of the air is better than nothing and should help keeping the coffee fresher a little longer, it's also a very nice looking and feeling container.