This lens has some very specific appeal. First its a tiny little pancake lens that is great for a wide aperture walkaround. Second its very reasonably priced but still is a very sharp lens with nice bokeh. You can control the aperture from the camera and while you do have to manually focus its quite easy to do at this focal length. And it gives a bit of a different look than the Zeiss or Nikon primes, maybe a bit warmer color.

But like most pancakes, the edges and corners are going to be weak, with vignetting, softness, and some distortion.