I've seen numerous postings critical of Aerolineas. I can understand that LAN is newer, more reputable, and with a better on-time record than Aerolineas. The Argentine travel agent I'm using (Isabel at Buenos Aires Tours--superb!) informed me that there is a serious shortage of LAN flights in November and December of this year and that I almost must use Aerolineas to get around if I want to purchase flights in advance. Has anyone else heard about this shortage? Will I make it to my destination using Aerolineas or should I chance it and book with LAN, the few flights that are available?