A considerable body of research has grown up on learners' perceptions of computer-assisted language learning, clearly a key consideration for curriculum designers and teachers involved in the planning and deployment of technology. This article aims to contribute to this work by focusing specifically on learners of English for Specific Purposes (ESP) (n=20) in light of their experiences with a blended learning course (classroom + Moodle). Analysis of semi-structured interviews suggests generally positive attitudes towards the experience, and yields insights into the specific aspects of the course which were valued by students and which were less so.