I think a lot about the user experience when I'm testing . Not only for conformance with the UX guide we refer to but also in less tangible, subjective, respects such as how the software will feel to different kinds of users. The UX guide can't help here. Although it has value and the potential to save time - for example, by reducing the number of discussions about capitalisation policy for dialog title bars to merely single figures per release - at close to 900 pages it is not a shining example of usability itself and it doesn't try to answer the question who's a user? In particular, it has only a handful of mentions of new users outside of the section on first-timers which itself is largely about setting up the product rather than using it. Inexperienced users will at various points form a significant enough proportion of your userbase that they merit special attention and when that happens, you'll need to think about lack of experience with ...