In parallel with the spread of English as an international language of communication, English Medium Instruction (EMI) has rapidly gained importance in Turkish tertiary education but also brought some controversy among students and academics. It is important to clarify the prevailing situation in order to enhance the quality of instruction. Descriptive in essence, the present study examines the results of a survey about EMI courses in the context of a technical university conducted in 2018 to understand students' attitudes towards EMI courses, the challenges they face and the suggestions they make for improvement. Although there are some positive aspects of EMI, such as getting ready for work life where English has become prevalent and the presence of a large number of resources and articles in English, there are also some possible challenges, such as linguistic challenges inherent in students' language learning history, some lecturers having limited English proficiency and ineffective courses. Although it is deemed prestigious to offer EMI courses, some changes are necessary. Taking students' views into consideration, some suggestions are providing intensive English for Academic Purposes (EAP) courses to help students cross the linguistic barrier and equipping lecturers with the necessary skills before appointing them to EMI courses.