Hi.
I like Paperpile but there is this one feature that I would love to have that is being able to download large numbers of PDFs or even the entire library to my iPad to not have to worry about having to sync papers that I intend to read later. While one has access to WiFi most of the time, sometimes it is unreliable and slow, especially in public spaces. I use my iPad mainly for reading papers, and I would not be surprised if many more do, so I got all the space to download as many papers as I want.
Thanks.