Found the process engaging, you have 2 stage process whereby they dive into your background and your understanding of the role Quick, efficient and relevant. I would say the questions are not difficult and is quite standardised

Initial call with the Internal Recruitment Manager - really nice guy. 2nd stage with one of the Directors. Extremely un-interested in speaking with me and 30 minutes late. Quite condescending. Thought I'd be better in a 'Resourcer' role following my 5 years Client Management experience so clearly didn't listen to a word I said / highlighted in the interview but I knew he wasn't interested in the first 10 minutes anyway. Didnt see the interview as a 2 way street at all and didnt tell me anything about the role I was interviewing for, just asked me tons of intense questions.