“…The trickiest bit has been developing metrics for what’s ‘successful.’ While I can say that a user can get to a product in X clicks or X seconds, that’s not really successful. What’s more important, and well-nigh impossible to measure, is what happens afterward. Any pointers/suggestions to usability engineering for the mushier domain of consumer-oriented, content-heavy sites will be greatly appreciated…” Here are the responses: Re: User Testing General Audience Web Sites — Advice?.