Richard Wong published the full 10-25mm f/1.7 lens review. Quick summary of the lens:
– Overall awesome picture quality even when compared to the Leica prime lenses
– The ultimate lens for a lot of videographers?
– It’s big and expensive, but not really big and expensive if you consider what it actually replaced in your camera bag
– Apart from lack of OIS, it could be a good vlogging lens too
– Great lens for astro photography too