Cons: Once you click a link, there's no reading history to get you back to the main book text. You have to create a bookmark before going to read a footnote/endnote. Once the footnote is read, you have to go back to the bookmark to continue reading.
That is very strange! I'm using footnotes links all the time, never had to create bookmarks. There is a back button, hardware one, you just press it and it take you back at exact same page where you have clicked the link.
Anyway Aldiko is a best book reader on Android in my opinion. But still far from matching best book readers for WinMo or PalmOS.