Good availability on flights...
I have to say that my last few award bookings through TACA have been so unbelievably easy that I cannot contain my happiness. I just booked an open jaw award to Costa Rica for a few weekends from now. The whole process took me 10 minutes on the phone with TACA. Now, tomorrow, the phone call to GP.
Although I don't live in a gateway city, I love being able to use my mileage stash for these kinds of trips to Central and South America.