The process was very smooth from start to finish. Medium was very accommodating to a period after the initial phone screen where I caught the flu and had to re-schedule. I felt that the communication throughout was very timely and no "ghosting" occurred as I've seen in other reviews. I always felt informed and that the recruiters were being open and honest with me each step along the way.
The process goes like this:
1. Phone Screen w/ Recruiter (are you a real human being?)
2. 1:1 Video Call w/ Director (resume walk-through, why Medium, etc)
3. On-Site w/ 3-4 People & Lunch
4. 1:1 Phone Call w/ VP (final stamp of approval)
Start-to-finish it was about 2 months, but I can't imagine it would typically take this long. The holiday season fell between the initial phone screen and my 2nd interview and I caught the flu at some point in there, but everything was very timely after that (keeping in mind I had to travel across the country for the on-site).
Interview questions are primarily behavioral (non-developer roles), assessing work history and overall fit within the organization (with a heavier emphasis on the startup culture and determining your desire to work in that environment). They really want people who exhibit passion for the product and a desire to do whatever it takes to make it successful going forward.