The current paper attempts to investigate learners’ perspectives towards the strengths and weaknesses of peer assessment in academic writing in the context of tertiary education at a private university. The study was conducted on 55 third-year university students who had finished the academic writing module that applied peer assessment in writing. The research adopted the mixed method of qualitative and quantitative approaches via the questionnaire with both close and open-ended questions. The results of the study reveal that the use of peer assessment was feasible for large-size classes at university to provide learners with the opportunities to reflect and enhance their language scope and social knowledge to improve their writing performance. However, certain limitations were acknowledged, such as the lack of assessment competence among learners and the time constraint in the classroom, especially the hesitation to violate the positive face of their peers.