Was contacted by recruiter to have initial phone screening. Very typical interview in which he asked about experience and described the company. Went in for first round of interviews with PMs. The discussion was focused on the company and job role. The people were very friendly. Was invited back for final interview with senior staff (VPs) and CEO. One interview was a difficult case study that didn't go well. I was thinking of the problem more from what they wanted from a PM, but missed the mark. The other interviews had other case questions that went better (a PM perspective was more on target). The CEO was very friendly and passionate. Was disappointed when time went by and I didn't hear back one way or the other. The recruiter called back to say they wanted to hire me, but needed to convince one person. They said that it was more of a formality and I should get a call/offer in a few days. Never heard back. I was ok with not getting the job, but felt some of the process was unprofessional (not calling or returning a call at the end to let me know one way or the other), especially considering how much time I committed to the company.