I have an iPad Mini 1, which I use to display my Paizo PDFs and my rather large collection of 3PP materiel. My readers are Adobe Acrobat and the paid version of Winzip. I have issues with PDFs loading slowly often, sometimes taking a few minutes to read. What are some possible causes of this, and how would I rectify them?
Also, how might I remove unwanted PDFs if my method of adding them is to download them to the iPad and extract them with Winzip? How might I remove some PDFs that were added via sync earlier? From a computer other than the one originally used to add them?
PDF Expert is by far the best I've ever used, including Goodreader which I used to use. It's a little pricey but worth it. It also unzips zip files and you can fill in pdf forms eg. Form fill able character sheets.