No problem to date
My PP linked to a credit card allows me a measly 6 lounge visits a year. This year, I have used it in Helsinki, Newark, Lahore and Colombo without any problems. Having said that, the PP-accessible lounges in Lahore and Colombo are not too flash; however, in Colombo, the guy made me a stiff Scotch which helped me to sleep on the red-eye flight, can't complain.