I like it - it adds some realism from the standpoint that firing while moving (yes, I know, its not overly common, but I do it) will be easier - I've had left/right mapped to the rudder for awhile. The zoom in/out with pre-sets will take some getting used to, I mapped my zoom to the throttle slider on my stick.
The new sights with ranging - I've been asking for those for ages.
A long, long time ago, in a galaxy far, far away, I played Panzer Commander. It was, for its day, a tremendous game. I remember the sights being exactly what AH is headed towards now, although back then they actually blurred the target to simulate the focal range.
All in all, I think its great. I don't get much value from the interiors, I'm usually too busy trying to avoid getting shot to notice the scenery on the insides of the vehicle.
But I agree with everyone else - a Tiger shouldn't roll over on its back when it encounters a tree. Down with the killer bushes.
J