I applied in November and got to the assessment centre in January. It took me longer than the others because of a phone conversation in Dutch that needed to be done and the fact that it was over the Christmas period that was quite difficult to find the right time. The online assessments are not difficult. The case study was stressful and the phone interview daunting because of the repetitive questions. The assessment centre went a lot better than I thought. My advice would be to take it as an experience and not put any pressure on yourself. There will be a round where they test you under pressure and how you can think and answer on the spot.