Good but could be better
The good news is I was able to copy from my MacBook app to my iPad app my entire 200+ ePub collection via iTunes sync. However the instructions that come with the app arent specific enough on how to do that if you havent used the special screen at the bottom of the iTune app display. There is a clear explanation on the Adobe user forum for this tho if you look.
Bad news is that if youre reading something and shut down the app, when you go back later the app doesnt keep the book open you have to find it again. It does open where you left off, but unlike my Kobo reader the app does open by default to the book and page you were last reading.
AvoidThisApp about
Adobe Digital Editions, v4.5.1