A little of my experiences with the 7d2. I have owned 40d, 7d and 5d3. Have also owned a Nikon d300s and have spent some time with a d750.I am on body #4 of the 7d2. First 2 were all over the board for Ai Servo focus. Some pics were sharp, some way off, like nothing in focus even tho the camera "indicated" it had focus (both priorities were set to focus). Yep - did MA (not real help), tried various Cases, tried to slow tracking, speed tracking, rest to factory etc... Just inconsistent. Against my better instinct, I opted to go for the 4th instead of just moving to the d750 (I put a lens on it and boom, sharp pics). Since I shoot more field sports, on paper the 7d2 was really what I needed so I gave in.I will say #4 is far superior than the previous 3, however, there are pictures where I have to scratch my head and think WTF... Now with about 4000 shots on this one - I will say that it takes a whole lot more sharpening than any other body I have ever shot and it seems to require a bit higher SS than any other I have used or to put it this way, I feel more confident in it with a higher SS.All in all - so far, it is a body that I have the least amount of confidence shooting and it is one that I feel like I have to pay attention to a lot more to shoot. If I could do it all over, I think I would have picked a different option.