The Lenovo M900 Tiny arrived. It came in a big, long box, which turned out to also contain a full keyboard and mouse, plus lots of packaging around the machine, which is metal, sturdy, and heavy. But very small!
One annoying thing right away is that the specs are different than what I ordered: 8GB RAM instead of 16GB (less), a 1TB drive instead of 500GB (more), and a slightly different CPU.
I’m making notes as I update Windows and then put Ubuntu on it Lenovo m900 Tiny Setup