Hi Neil -- Nice Moment , the light looks harsh but you have managed a sharper image here than your previous posting . Contrast looks a bit strong due to the light and also i feel it is a bit tight on the left and can be slightly tilted . lets see what others have to say . TFS !
Lovely composition but I don't think the image is quite sharp enough on the cheetah's head. The pale fur between his head and neck and back leg looks a little hot. I think if the hots were dealt with the image would appear a little sharper equally I think Haseeb is alluding to lowering the contrast a little, I suspect this will help greatly.
I would suggest with a moving subject and a 600mm lens 1/800 sec could often prove too slow.