I like how easy it was to use this software once you figured out where everything would go in order to create your zip file. There were times when i had no idea what an option did or why that one seemed more confusing than others so if anyone isn't sure of anything feel free to ask! It's very intuitive but not always 100% clear which options are most beneficial depending upon user needs/expectations at any given time (which can be frustrating). As long as users understand their requirements they will learn quickly with jsZip however there may still exist some confusion about certain features such as adding multiple folders into separate zips etc.. We're solving our need to send many large documents over email via Zipped attachments by being able to easily open them again without having issues opening those same emails after unzipping from another location later down stream.