The interview process was quite similar to the ones described in the other reviews.
1. Thorough telephone interview, partially in english.
2. Assessment Center, whole day.
In the morning there was a brief company introduction, then the usual consulting firm skill tests (Arithmetic and Logic; Number Comparison; Time management; Translation). Then a detailed presentation of the company by a senior colleague, emphasizing the work-life balance at the company.
After a brief lunch the applicants were formed in two groups, those who didn't match the minimum requirements were sent home.
In the afternoon every applicant had to prepare (5 min) and talk (2 min) about a topic ("Describe a recent project what you worked on") in front of the interviewers and the applicants who already did the presentation. Some of us had to change to English during the presentation or got the questions in English.
After this there was a role-play where all the applicants as a team had to solve a problem according to their roles, attitudes and resources defined by the allotted individual descriptions. Interviewers were silent and taking notes during the exercise, obviously looking for soft skills and facilitators of a consensus solution.
3. Personal interview with a senior consultant and a recruiter. It was more about personality and attitude than experience or achievements. There were some typical 'google brainteaser' questions (How much would I charge to wash all the windows of Budapest). I was on the edge to tell them Google dropped these questions ages ago for proven totally unrelated to the future performance of a candidate.
Also there were more insight on the job and the company culture highlighting the demanding nature of working for a consultant firm and work-life balance.
4. Personal interview with a manager. It was a rather delightful conversation about my achievements and further goals, totally about professional matters, previous projects and thoughts on the job. The interviewer was open to questions and honest about career advancement and resource management (me coining out the recurring topic of work-life balance).
5. Personal interview with a senior manager (division leader). We talked in English during the whole interview. It was 50% about attitude and personality and 50% about professional achievements and personal opinions on various topics. I think it was more about reassuring the outcomes of the previous rounds, a final vetting.
One week passed between the phases on average, after the last interview I got a written offer. I turned it down due to my concerns about
* work-life balance (intentionally poor resource management, unnecessarily high workload before deadlines)
* the motivational system (you should work as hard as you were one level higher, but get a paycheck for your own level)
* the advancement opportunities (up-or-out, which I have no problem with, but I could only use my experience in the field of consulting and limit my options to switch)
* inadequate compensation: regarding all the above - especially the high workload - I was offered way less than I'd wholeheartedly sell out my work-life balance.
My two cents about companies who talk a lot about work-life balance:
it's mostly just work and no balance.
(I'd say it's true for all the big consultancy firms)