Received an email from HR that went straight to my gmail junk mail since it was from an unidentified source. Luckily I came across it. When I informed HR of this they told me this was a "common problem" and that there was "something wrong with their system," Invited me in for an interview but did not advise me as to whether it would be a personality based or case based interview. I asked friends at the firm and they said it would likely be a personality based interview. Arrived at the interview, not knowing who would be interviewing me (very unlike the other top consulting firms I interviewed with) and was given a case. The interviewer was very kind and it was fun to work through the case with him. Was informed the next day that I had made it to the next round (once again, no mention of what type of interview this would be). Interview was set for a week later. 1 day before the interview I received an email informing me that I had progressed to the next interview stage and asking me my availability. I immediately contacted HR and advised them that they had already scheduled me to come in the next day. They got back to me and informed me to come in at the same time - did not apologize for the confusion. At the interview met a consultant and HR. Consultant was nice but HR woman was awful. Was extremely unprofessional (only person in the office dressed unprofessionally) and treated me extremely rudely. She was condescending and seemed to have made up her mind about me before I entered the room. I was later told that she took pride in making candidates uncomfortable and had even made a previous candidate cry a month ago. She tried her utmost best to shake me and wouldn't smile once. During my interview with her I immediately decided I didn't want to work at the firm based on the way HR treated their employees. I was thoroughly unimpressed with the firm and the entire interview process, I cannot begin to imagine how they must treat their clients and employees.