The application is online and there's an essay portion to it.
They started off with a phone interview which was about 45 minutes long and super in-depth. It was all behavioral questions and they force you to use the STAR method so if you start and don't use it, they'll stop you and make you start again. At the end of that phone call, they'll tell you whether not they want you to move on to their assessment center.
In the assessment center, you get a case study which you read overnight then you use the same information for your super day. There's 2 group projects, a presentation, a role playing scenario and finally a one-on-one interview. They'll tell you usually within a day if you got the offer or not.