Imaging Resource posted the first part of their A99II review. Of course they like the camera a lot, particularly the image quality. The only real downside is that:
Overall, the biggest issue with the A99 II’s performance is its buffer clearing performance. The occasional slowdowns in the field, such as when the camera is writing files, can be frustrating as well. It is puzzling why Sony opted not to include UHS-II support in the A99 II as it would have surely helped accelerate buffer clearing. With all that said, the A99 II still offers very impressive overall performance. Being able to capture 42-megapixel uncompressed RAW images at over 11 fps, while just shy of the advertised burst rate, is excellent.
Also the German site Photoscala. tested the camera and writes that it’s impressed by the fact that the semitransparent mirror seems to not deteriorate the image quality. For them it is as good as the A7rII and the superb A99II autofocus makes it more useable than the A7rII.
One more A99II review by Francesco Carucci.
Sony A99II preorders at BHphoto, Adorama. Amazon. PhotoPorst, Calumet Germany, Amazon UK and WexUK.