Initial phone call with the recruiter - standard qualifying questions about experience, education, what you know about the company etc. Next round of interviews involved a panel interview with three senior level employees. 1 1/2 hr. total. Very relaxed casual conversation. Questions were mainly behavioral based, wanted to see how you react in certain situations. Also tested knowledge of the company, competition, industry etc. Final round interview with director. Again, very relaxed. Mainly focused on experiences and figuring out your desire to work for the company. A few behavioral questions but not as many as the first round. Overall positive experience. Received an offer within a week of the last interview.