They've got all the modern stuff (pressure oiling, etc) but they're based on an antique design.
They're massively overbuilt (which means they're also heavy), but easy to handle, easy to start when they're in tune (one set of points, one carburetor, so it's not hard), and they handle pretty good considering the rigid rear end. They'll run comfortably at 65 all day on the highway.
Here at home, parts are cheap and available. You can work on them with the most primitive tools, and there's nothing fancy about them. Anyone who can live with a BSA or Triumph or Norton or Ariel from the same era can live with one of these ..... !