The first round turned me off a bit because I felt like I was being over-sold the company and the interviewer ended up talking more about his own accomplishments and asked nothing about me at all. I felt like I was being given a sales pitch. I wasn't really excited about working with the guy I interviewed with. Anyway, I decided to go through with the coding challenge, even if it was just practice for future interviews. Admittedly, my reservations about round 1 meant that I didn't really put my heart and soul into the coding challenge. Also, I found the challege to be biased toward people with a specific kind of knowledge. If you had that knowledge going in, you could probably nail it very quickly. However, I ended up having to spend a significant chunk of the alloted time familiarizing myself with the central concept. Of course, that put me at a disadvantage. My solution worked pretty well (it passed the provided tests) and was somewhat clean but if I had more time it would have been much better. If I were a less honest person I would have just spent a few more hours on it and submitted something that was near perfect. Long story short: they didn't like my code and it was painfully obvious. The follow up interview to discuss the code was very painful. They seemed to only ask me "how would you make it better?" in a bunch of different ways. At some point I just got really uncomfortable and just wanted it to end. Before the end of the meeting I knew that if by some miracle they wanted to move forward that I was definitely not going to move forward.