I have a Priority Pass too (I get it free with my Swiss VISA card, and in add the first 4 visits per calendar year are free too, subsequent visits then would cost $25/visit).

One big disadvantage compared to the lounges of "my" airlines - the Priority (accepting) lounge doesn't provide the airline services (check-in, changements, vouchers if the flight is late, etc.) and it is rare (and would be just luck) that the priority lounge is near the departure gate of my flight.