I haven't experienced any service problems with Copa of late (though my last flights with them were about 3-4 months ago), but what does have me concerned are their unusually high airfares of late for those of us flying out of Mexico City. They used to match any sale from their big regional competitors in this market (Aeromexico/Avianca/Taca/LAN), but not anymore. Strange. So, LAN has become my new "go to" airline for Latin America.