I recently flew business JFK-NRT, ANA outbound, United return. Dramatic difference. ANA was ten times better than United. I've been in other United business class lounges and they're all terrible. If you don't count corn flakes and packaged cookies, very little, if any, food. In Tokyo, for example (on January 28, 2013), there were 7 (SEVEN!) pieces of sushi available. It was not replenished until long after there were none. The food on the flight was unpalatable. Some mystery meat appetizer that they called prosciutto. Bad sushi (in tokyo? How do u manage this?); a few things rose to mediocre.
Their San Francisco lounge sets new standards for rotten. If you want a "premium" beer such as Sam Adams, you have to pay for it and tipping is demanded, not just expected. If you're flying business, United is the absolute worst in my experience.