eLearningIndustry tested and made a review of Google Classroom, in which they highlighted many positive and negative aspects. Among Classroom's strengths, the review highlighted ease of use, universal device accessibility, use of Google Drive as an effective way for teachers to quickly share assignments with students, the paperless process meaning the end of printing, handing out, and potentially losing work, and the fast feedback system between students and teachers. Among Classroom's disadvantages, the review highlighted the service's heavy integration of Google apps and services with limited or no support for external files or services, lack of automated quizzes and tests, and a lack of live chats that can aid in feedback efforts.[21]