Not totally e-tickets yet, or still bugs in the system. I just booked a reserved Keystone for Thanksgiving and was presented with three delivery options: e-ticket, Quick Track, Agent. I chose Quick Track and received two copies of the "THIS IS NOT A TICKET" emails stating a PDF was attached with the code, neither had any attachment.

EDIT: 5 minutes later I received two more emails with the attachment, four emails for a single ticket. I like the layout of the ticket, looks very much like a Delta boarding pass.