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This paper presents one of the first systematic investigations into the usability of Volunteered Geographic Information (VGI) editor front-ends, using established best practice in Human Computer Interaction (HCI) research. The two front-ends evaluated are Potlatch 2 and Google Map Maker, to present contrasting views of the user experience of two major VGI projects. Two user groups with no prior experience of VGI contribution were instructed to enrol and contribute data to both VGI projects, and their interaction with the two services were monitored using a mobile eye tracker and video screen capture software in a computer lab environment. The resulting data was analysed to reveal how users interact and experience VGI editors, as well as highlight deficiencies and differences between Potlatch 2 and Google Map Maker. The results from this research project are a set of recommendations for the future development of these editors, specifically relating to improving the user experience and ease of use of VGI editors.