I find it very good...
Transferring epubs made in calibre through iTunes (Apps) into the app (Stanza) is straight forward, if they don't show cover, open the book and when it goes to 1st page where you see your cover, tap it and a popup will appear, tap "Make Cover" and then you will see the cover in your library, had a few tweaks in settings for my best viewing, added a book in PDF format and looks good...
Good update and it's free
...
