What I used to use the most from the website is its free online video downloader, which is totally free video downloader with simple user interface. But the software nowly is off the shelf. This is also why give it four stars.
Once its Amazon Video Downloader released, I downloaded the trial version and take a try, which has simplified the download process and make the downloading fast and feel free. Nowly it supports downloading from different regions and primevideo, that is so cool and wonderful while downloading movies from Amazon Prime. Don't hesitate, just try it.