First off, it is great to have this beast in the game. Those who were worried about it, don't be. Those who were thrilled to have the "best" tank in WWII at their disposal, be guarded. For the most part treat it like a Firefly but you may cringe less at incoming rounds to your front due to the far better armor. Below are a few of my observations:
The main gun has a reload rate of 6 seconds. That is on par with the other heavy hitting tank guns in AH (Tiger, Firefly, T34/85mm). The HE round from the main gun produces 163.6 points of damage. That is 4th in line behind the Tiger (234pts), T34/85mm (231pts), and M4A3/75mm (173pts) respectively.
It has a speed of 29mph. Right on target with historical data.
The MG34 gun mounted on the commanders cupola is near worthless vs aircraft only for the fact that it has very little elevation. I did not accurately measure the angle, but I bet 30 degrees would be generous. Also, it does not have 360 degree traverse, but about 270 at best. The MG34, at least the one on top of the Panther has been given a face lift. The new model is much nicer!!!
Currently, it is perked at 22 (?). I didnt double check the ENY, but it must be close.
Feel free to add in your own opinions and observations.