There is already a first review on ePhotozine:
Whether the photographer sees this as an unusually long standard lens or as a slightly shorter portrait lens, the 75mm length proves in use to be very equitable. We can approach our portrait subjects quite closely, but not so close as to cause distortion of the features. On the other hand, as a general-purpose lens there is some merit in having a longer focal length and having more space in which to work. In a similar way, 100mm macro lenses tend to be more popular than 50mm ones.
As for performance, this is just exemplary, the Samyang AF 75mm f/1.8 FE is an outstanding lens indeed. Along with a moderate, realistic price tag, compact size and great handling, the only caveat is the lack of sealing against water and dust. This still leaves us with a superb lens and an obvious Editor’s Choice.
Here is the first look from John Sison:
And this is the official product launch video: