The mobile application Be My Eyes connects blind users with sighted volunteers through a video and audio connection. In contrast to previous attempts, Be My Eyes has a large number of blind and sighted users. In this paper we report from a survey among 30 blind Be My Eyes users to guide future work in this domain. We describe for which situations blind users find Be My Eyes useful and which are challenging. Furthermore, we identify users' concerns and areas for improvements. Finally, we derive directions for future work.