I tried ShuBooks, BluFire, and uBooks. The latter is easily the best of the three. Most importantly, it fills the whole screen with text once you disable the status bar. You can change the size of the text precisely. For the other two apps you can only proceed in big steps. Colors are adjustable as well. It has a reasonable menu which includes Library, TOC, day/night mode switch, text search. Library can be sorted by Author, Title, Genre. This book info can be edited. Page flipping is simple and pleasant, you can choose automatic scrolling, but it looks just a tiny bit jerky. I uploaded by dropping into iTunes, but wi-fi options are there too: browser and ftp. Takes both epub and fb2. There is translation of selected words, but I didn't test it and don't know how it works. To summarize, this is a no-frills practical app, which just does what it is supposed to do. The free version has some ads in the menu but not in the text. In fact, I might think twice before switching back to Stanza once they fix it.