It will come as no surprise that the Chromebook is perfectly tailored for working on documents.
All of Google’s productivity apps accessed from Google Drive -- word processor, spreadsheet, presentations, and more -- work well on the Chromebook, and they also work offline, allowing documents to be created and used without an Internet connection. They clearly expect heavy use of this feature, given the extra capacity perks that come with devices.
Google’s cloud file storage also caches recently used and user-specified files offline. The only problem I’ve encountered has been the surprisingly poor support for ODF (Open Document format) in Google services. My workaround: Use Chrome Remote Desktop to access LibreOffice back at base.