I didn't have much problem with the keyboard itself, more the tiny sliver of screen that was let to view the app for when the keyboard was visible. Made it very hard filling in the settings* for an IMAP account.

*not helped by the layout of the settings page. You get half way down the page, find a button saying "Manual settings" (or something like that), press the button and the extra settings don't appear below the button on the page, but somewhere further up the page and thus not visible. Very confusing design.