Pros: Well, the afternoon flight we got rebooked on was lovely, but it would have been great to actually get on the flight that we got up at 4am to take.
Cons: The headline says it all. We were the first in line at the airport in the morning, with our reservation in hand, only to be told that our "LACSA" flight was canceled even though the plane for the partner airline, SANSA, was there and took off without a hitch while we watched in dismay. The staff told us (wrongly) that we should be able to make our 3:30 international flight if we rebooked onto the 1:45 flight that got in at 2:30. Turns out there was no chance of that working, it was simply bad advice.
We missed our connection in San Jose as a result and had to pay for a hotel and then pay $1100 to get a new ticket home the following day.