Similar experience to most..phone interview with a friendly recruiter, then 1:1 interview with multiple people in-office. Sensed a lot of disorganization but still seems like a relatively fun place to be. Most people were very friendly and helpful. The problem was one of the interviewers, an HR guy named Dan. Must be the "expressionless" guy. Came in and immediately had a negative approach, no answers seemed good enough and criticized every answer I gave, would cut me off in the middle of an answer to tell me I didn't sound sincere. Seemed to be on a huge power trip. Hands down the worst interviewer I have ever experienced, and felt my time was wasted by talking with him. Other than that, I had a positive experience with the other people at groupon.