Perfect clarity and alignment. For my tastes, the crop is a bit tight and centered. On a completely personal level, the subject matter is "boring", but certainly wouldn't be to a jet enthusiast and their calendars!
It's a good shot but feels fairly static. You have some high-flying fast jets seemingly suspended in mid air in the middle of the shot. Dont get me wrong, I've seen shots like this a lot and I'm sure a shot like this would appear in a calendar but it's not very compositionally interesting even though their manoeuver is certainly exciting to watch.