I like that it's very easy to use and has an intuitive interface. It also handles large zip files without any problems, which makes this tool really useful in my work as a developer. The only thing I don't particularly care about is that there are no options to set compression level or other settings. Otherwise everything works fine! If you need something simple but powerful to create zips with Javascript (or even server-side), try jszip. You'll be glad you did :) We're using it to compress our JS bundle in order to reduce its size by 2x compared to what we could achieve otherwise.