Similasan USA interview questions

I was scheduled for a 90 minute window to meet with four executives, via a retained recruiter. It seemed to be going very well, as the timeframe stretched to over 4 hours as we were chatting. Left feeling very positive about the lines of questioning and culture/fit of the company. It took them three full weeks to get back to me, and ultimately they went with someone else. I was told that there was no negative feedback about my interview performance. I feel like my time was totally wasted, and now have a bad taste in my mouth for this company.