Contacted by recruitment 9 months out of undergrad after (understandable) no response from on-campus recruiting. Went through pre-screening over the phone; seemed focused primarily on making sure I could start quickly and had no obvious red flags. Received phone interview schedule about a week later.
First round over the phone; consisted of a behavioral interview with a project manager and a case interview with a consultant. Behavioral interview questions seemed very standard. Case interview was as I stated above. I got an offer to use Excel (with the interviewer software-ing in to see my screen) but turned it down. That was a mistake;, accept it and use it as much as possible.
N.B.: Case was unexpected, but not hard. If it showed up in an MBB-type interview it would have been maybe 1/4-1/3 of a product launch case. Could easily be finished in 10 minutes with Excel and no panicking.
Second round consisted of lunch with an associate, behavioral interview (conventional questions), written case interview (40min work + 40min analysis with interviewers), presentation of BAA work, then a second case interview. The written case was deeper and harder than the one over the phone, but the same type of question. 4 parts, 3 very quantitative and the last slightly less so. I finished 3, which was above average. Walked through my analysis with the interviewers (recently-promoted from BAA) and then did Part 4 with them. The second case interview wasn't introduced that way on the itinerary and was just given as a very low-detail "Hey, think about this" question; the linear thinking skills from MBB-type practice WILL be necessary here, and frameworks might be useful.
No offer, credited (by them) to going scattered during the final step instead of approaching it the way I would an MBB-type case.