The one that consisted solely of multiple rounds of phone/Skype interviews went on over the course of a few months and had positive feedback each time. Very recently one of the cofounders emailed me and said they have decided that they aren't going to hire for this role at all. So it was interesting to see this company advertising the same position yesterday. The cofounder emailed me a week ago.
The two interviews I had that progressed from multiple phone/Skype interviews to actual on site interviews were very similar. I felt that the onsite went very well and the feedback that I got from the recruiters was that "everyone really liked me" and "thought it was a good fit" and "how did I feel about it. In each of those I had mutual positive feedback and said I was interested in moving forward.
What followed in both of these was unprofessional and disrespectful behavior. Recruiters responded with "Great, you will hear back from me by the end of the day" and we talked salary and relocation issues. And then days and weeks would go by with radio silence. Needless to say this puts the candidate in a really awkward position. Feeling that enough time had significantly passed I reached out to the recruiters and new assurances would come about they are waiting on something and they would be getting back in touch asap, by the end of the day or latest tomorrow etc. Then the dithering and silence would be being anew.
All three of these companies had postings yesterday for the exact same positions. In fact all three perennially post these same positions on the "Who's Hiring" threads.
Anyway, thanks for letting me share.