PDF's are a hit and miss to me because the built in viewer is fast and snappy but does not have thumbnails or bookmark support while evince does have thumbnails and bookmarks, it takes evince like 5-10 seconds to load each thumbnail and my PDF's are sometimes over 1000 pages.
It is however sometimes annoying when the site for some reason does not allow for finger scrolling. For example, amazon.com switches to "text select" mode instead of allowing for finger scrolling.
Now Ebooks is by far the most frustrating thing and if anybody has ANYTHING to say or suggest I'll be MOST grateful.