When it works, it is very nice. However, I have had to use the Activity Monitor to kill it after switching from the voice recorder to another app. The app disappears, and double-clicking the app icon does not bring it to the foreground. Also Command-Tabbing does not show the app icon among the active apps; but Activity Monitor does show it. Also, it will sometimes not permit selection of recordings from the list of previous recordings. I have had to quit the app and restart it to re-enable selection. (iMac w/ OS 10.9.4)