We used surveys and classroom observations to examine student reactions to two-stage exams, where students first do the exam individually and then redo it collaboratively. Our results show why both students and instructors appreciate this examination format: Two-stage collaborative examinations are relatively easy to implement, have a high potential for learning, and support the collaborative learning approach used in many sciences classes. A look at survey data from an introductory physics class shows that a vast majority of students (76%) had a positive opinion of this exam format (expressed in 236 comments) whereas only 10% expressed an overall negative opinion in 30 negative statements. Most of the positive comments relate to how this benefits learning. In this article, we describe how to implement two-stage exams, discuss advantages and disadvantages, and present the students' view.