Cabin is an idea whose time has come. It's a hotel-bus that shuttles you between San Francisco and Los Angeles over night. Wake up at your destination alert, refreshed and, hypothetically, having lost no time to travel since you would have been asleep anyway.
For me the two most important things about a writing instrument are that it works and that it feels comfortable in my hand. On those two metrics, nothing compares to the Zebra M-301 mechanical pencil.