This experiment is a case study that applies a HCI-informed DMI Evaluation Framework. This framework applies existing HCI evaluation methods to the assessment of prototype Digital Musical Instruments (DMIs). The overall study will involve a three-part analysis - a description and categorisation of the device, a functionality evaluation that included an examination of usability and user experience, and finally an exploration of the device's effectiveness as a digital instrument. Here we present the findings of the first two parts of the framework, outlining the constituent components of the interface and testing the functionality of the device. The final stage of analysis will involve a longitudinal study and will be carried out in order to assess the musical affordances of the device.