This is a great app for doing exactly what it says - ejecting volumes. I am a lecturer and as such I get a lot of students showing me their work on USB drives. The vast majority of my students use Windows so do not really understand the importance of ejecting a volume before removing the device, leading to a lot of confusion and worry when they simply pull the USB out of my machine to be greeted with the dreaded warning from OS X about data loss. This app helps with this - they can see when the volume is ready for removal and it makes the process nice and simple (try telling someone who has been raised on Windows to drag a drive to the trash - it melts their mind!).Only improvement needed - and hence why 4 stars - is the ability to eject ALL volumes. As is made clear in the app description, there is an issue with sandboxing that means that apps find it difficult to “talk” to each other, so some drives cannot be ejected using this app. I would LOVE this to be fixed, as it appears quite random as to what constitutes a “unejectable” volume - sometimes it is a USB key, other times it is a USB harddrive.Other than that - great app, thanks for all the hard work!