Offer a full frame camera for this price is already an announcement. However, it must also be noted that this camera is far more expensive, because the Sony FE lenses are relatively expensive. If you select now from the lens-Park by Sony, this system is probably more expensive than comparable from Canikon.
Personally, I like to use old lenses and here stands the A7II with the built-in image stabilizer. I manage to actually partly to take pictures with 1/8 and get sharp photos! Respect. Along with a bright lens, which is the perfect combination for shots in low light conditions.
The build quality is top and the new modified style I like. Especially the 4th programmable button is super. The camera is not as perfectly balanced in the hand as the older models. However, for it offers the trigger to a more pleasant place. The increased weight by the image stabilization falls only at the beginning.
Many of my photographs are made in low light conditions (Stage Photography). The high-ISO performance could be better in my opinion, about 2000 I would not go with this camera. Nevertheless, the color noise is limited and it is a lot better than I thought. In videos go to ISO 2000 is possible without any problems.
Everyone is looking for a cheap, but top-equipped full frame camera will be satisfied with the A7II. Cheaper is even with the predecessor, but then without the great image stabilizer. I would recommend the camera and generally the Sony system fully.
Disadvantage:
The lack of mirror in front of the sensor, the sensor is not protected against dirt. You should change your lenses carefully. Some say there were dust particles on the sensor, but nothing bad (for me).