Its OK.
Not sure what their business model is. I have found some good content on Medium, but its fairly random. I first signed up for it simply because there was some content written by someone I know on it and I had to be signed in to be able to access it. I continue to do my blogging (khit.org) using the blogger.com platform, which has marginally better features. But, time will tell. Maybe Medium will improve.
BloggyG about
Medium: Read & Write Stories, v2.17.3454