I did have to check the calendar just to make sure.

Only had two flights this year with BA and they were both very,very good. As was the ground experience.
I think the most surprising part was how good the spread was at the UA lounge that BA now use at GRU.

Worst experience has to be the UA F flight from ORD. It really was a very poor offering and in comparison makes other airlines F products look exceptionally good.