I own two for M mount. The 35/1.4 Nokton SC and the 50mm f/1.5 Nokton ASPH. The 50 is outstanding, with very smooth bokeh and sharp from corner-to-corner from f/2.8 and only suffering a bit in the corners wide-open. It has no noticeable focus shift either making it very easy to work with.
The 35 is a different beast, behaving much like a vintage lens with noticeable focus shift and a general lack of sharpness at wide apertures in the corners, but nice and sharp in the center. Bokeh as others note can be quite nervous, but can also be beautiful depending on what it is that's being blurred.
Neither is my only lens of that focal length, with the 35 as a lightweight and classical alternative to the ultra-sharp and modern Zeiss 35mm f/1.4 Distagon ZM and the 50 an alternative to my very classical and gorgeous Leica 50mm f/1.4 Summilux pre-ASPH.