SonyAlphablog tested the Laowa 35mm f/0.95 Argus FE lens and concluded:
The Laowa Argus 35mm F0.95 (1069 Euros) is the fastest 35mm for full frame cameras. Unlike some cheap F0.95 lenses, it provide very good and totally usable images at F0.95. Sharpness is good wide open , color rendition if very good, background blur and bokeh balls are excellent. As of F1.2 you get very good sharpness and excellent as of F1.4
The main weaknesses are the long min focusing distance (50cm) , the resistance to flare, CA , the high vignetting and corners sharpness requiring to close to F5.6 to get consistency on the entire field
Its only real competitor is the Sigma 35mm F2 DG DN Contemporary (1500 euros) that is a more a workhorse for heavy duty job providing also excellent background blur and bokeh but not at the level of the Laowa. The Sigma is however excellent as of F1.2 and has very good to excellent corners even wide open. It is more versatile and can be used from Weddings, to sports, to night photography without any issues.