I flew TAP from LIS to Brazil and back on four occasions, alwys in C. I had a positive experience throughout, both on the plane and connecting: onece, my flight from somewhere in Europe was very late; I was amazed to see that not only did they wait for me but they drove me first to an office to stamp my passport and then to the plane to board! Mind you, that was about 20 years ago, so they may have changed their MO...