The rest of the iPad word processors
DataViz's $16.99 Documents to Go Premium offers the basics, but no more. A recent update made it run slower and added none of the key missing features: graphics insertion, paragraph styles, and revisions tracking. Its only advanced feature is its extensive support for cloud storage, including iCloud.
Google's Quickoffice (free with a Google account) remains a midlevel word processor if you edit local files, but its functionality is too limited for cloud-stored files.
Artifex's $9.99 Smart Office 2 is, in a word, unusable due to a very poor user interface and limited capabilities. And accessing cloud storage requires signing up for spam.