I've eaten at Yankee Pier a couple of times, but not recently. It was pretty decent. And free (up to $28 or whatever, excluding tip) is hard to argue with -- assuming that your Priority Pass plan gives you a free visit there. The fact that it is in the United domestic terminal, post-security, is a big plus. (I'm not keen on PP clubs/restaurants that are in a faraway terminal, and some are even pre-security at some airports.)