Compliance relating to eHealth websites has tended to consider issues around ethics, safety, privacy and trustworthiness. However, from an adherence point of view that acknowledges the care seekers role in accessing and applying the advice they receive, it is important to evaluate whether the eHealth site is designed to assist adherence. This paper reports a study involving the review of a paediatric online system for treating urinary incontinence in children that was found to provide accurate treatment advice but that advice was only adhered with 50% of the time. While many factors will influence patient (in)decision and behaviour, in the study reported in this paper we conducted a heuristic evaluation of this incontinence program and review of its functionality which was compared with the six most highly accessed eHealth websites. The study found that the incontinence program performed well from a usability perspective and provided numerous recommendations for further improvement of the system with the intention that this will increase compliance with the treatment advice. The evaluation approach used can be applied to measure other eHealth advisory systems.