This report covers the deliverable D7.2 of the COGITO project. It presents the evaluation of an 'intelligent' agent integrated into an e-commerce system. The aim of the agent is to support the user partly through direct communication and partly by guidinghim/her for navigating the web-site and for benefiting efficiently from the functionality of the site. In order to make the report a stand-alone report, it contains an introduction including 'Study of end-user needs and behaviour' exposing problemsconcerning e-commerce in general (taken from the D6.1), and a brief review of the objectives for the COGITO project in order to clarify the aims of the project. However, the important part of the report presents the methodology for evaluating theperformance of the COGITO agent and the outcome of this evaluation. The questionnaire for eliciting the background information for the test persons and their personal responses to the performance of the agent is presented in appendices.