This is the best of its kind. I love that it will automatically rescan disks whenever I mount them or they become available. Makes it so easy to keep catalogs updated. I also love that I can scan my server folders and NAS folders, filling in a gap with my mac and spotlight searching. It's very fast to find what I need. My only gripe is that you can't exclude certain disks from the autoscan popup, for example I don't want to scan my main laptop HD every time as I use spotlight for that instead. It's a minor niggle in an otherwise awesome program,