I recently acquired this Viltrox 56mm f/1.7 lens and overall I am very pleased with it. A very affordable and very well balanced lens that delivers. As noted in many online reviews, sharpness wide open is not only great in the center, but also it the mid frame and the corners. Nice soft bokeh and no chromatic aberrations that I can see.
Also, it is small, light and construction is more than adequate for the price. The only complain I have is the lack of an aperture ring, but I am getting used to already.
Few images taken with it (X-T3 and X-T5, processed with Darktable):
I picked up one of these a few weeks ago. It seems like the best bang for the buck of any lens for the Fuji X system. Incredibly small and light and very sharp.