There are a lot of postings here about PP but no specific thread.
My advice would be to check the web site of the airport(s) you're visiting and see if their Priority Pass lounge has "pay-per-use". Most do. So, if you don't want to fork out the whole membership, you can just pay 1-2 entry fees. The ones I've seen/used in the past cost between USD18-30, depending on the country and services offered.
If you travel a lot, the membership option represents great value.
Get paid up to 25% in real cash from your everyday purchases from leading companies such as Virgin Australia, Booking.com, Woolworths, Coles, Apple, Microsoft and much more. Free to join and no catches!