I studied a master here at UC3M and I liked the quality of the lecturers. However, it is very common to have exams and I do not feel it is necessary in such academic level. I would recommend it though.
It is worth studying Development Studies there are plenty of universities you can choose from.
Based on student reviews on EDUopinions, the overall rating of the Development Studies is 4.0.
What is the best university to study Development Studies?