Just there last week ...
Did my first trip to PEK last week, and dropped in on the lounge. It was barely worth stopping - minimal drinks and food, the computer desks have RJ45 connections pulled out of the wall and just lying around (so you have to go rooting around to get a working line), and the aircon was only marginally effective.
Good stuff? Umm, not exactly, but a lot of other flights leave well before UA 888 so the lounge was emptier than I expected for a chunk of time before the flight.
Next time, I'll follow moondog's advice above and arrive late; if I have time I'll stop at Starbucks ...