Cambridge does this as well and I can't say I was a fan. In mathematics, three years of learning ends up being evaluated through five three-hour exams administered over the course of a week. All it takes is one to fall ill for that week and all of a sudden you don't get a grade. The best case scenario is you can convince the examination board your illness contributed to your performance and they might award you a DDH (Deemed to have Deserved Honours) which no one will really understand.