I flew J on UA a few days ago, and the OZ business class lounge was just fine. It was quiet, but with several different TV screens playing things like CNN and BBC news, lots of reading material, dedicated wi-fi, showers, private relaxation rooms, a nice soup and salad buffet with a sign announcing that hot food would be served at standard mealtimes, and the usual beverages.
It was nice enough that I wondered what enhancements the first class lounge had: servants fanning you with ostrich plumes?