I interviewed at ManpowerGroup Poland last year and it was a fairly quick/simple process. There as no recruitment sourcing task but they asked me detailed questions about my previous experience an what i was looking for/if I would stay for long considering my CV appeared to be that of a job hoppers. Overall, they were very transparent about everything, very respectful, interesting and not trying to check off questions on their list as well as didn't ask inappropriate questions such as how much I currently earn. My interview took 2 stages, 30 mins each. Of course there were client interviews as well but most important was to pass meeting with Manpower as even if client doesn't accept you, you can be sent to a diff client. I worked there for 1 year and overall was great. If you have the opportunity to work there, grab it :)