[varaon]

My head is more often buried in code than in the product's UI. Our QA team has a better nose for when interaction or UI details are off than I do. In general, they spend more time using the application, and have a better instinct for when a given behaviour is wrong.

Some of the bugs they report would fall under the automatically testable category, but many don't.

I suspect that dogfooding is more effective at companies where the product itself is useful to developers or is a consumer app. e.g. Basecamp, FogBugz, Facebook, Netflix, Gmail, etc.