Whenever is possible, field data collection should embrace new technologies which help saving time back in the office and avoid transferring data from paper to a spreadsheet, interpreting somebody else handwriting, making mistakes in the transcription etc.
The advantages of using ODK are more, for example:
The forms are relatively simple to build and can be scaled up (in terms of complexity, although keeping them simple is key!
The large community of users means that there is a wealth of documentation online;
completed forms are submitted to a server where postgreSQL database is the main recipient. Having the forms in postgres allows using them straightaway in QGIS and webGIS projects;
the app works perfectly offline (but of course need to be connected to the internet for downloading/submitting the form;
the the app uses open standards
The main constraint of ODK is that is only available for mobile devices with an android operating system.
In the Falklands a couple of projects, the Coastal Habitat mapping DPLUS065 and in the Seaweeds Identification (led by Falklands Conservation), have been experimenting the use of Open Data Kit (ODK) as support tool.