UA changed all flights to Northern South America to GPU from CPU/RPU, but didn't make the seats lie-flat. I responded by switching all that flying to Copa, where I almost always clear the upgrade and even if not still get good legroom and food in Y.
Although the lounge in PTY is nearly as poor as the UA ones.
But, big thumbs up to the GUM crews. I recently flew HNL-GUM-HKG and back (with legs to the states) and was blown away by the service on those flights that touched GUM. Far and away better than even the better service I get in the states.