ROBERT M.wrote a review of Sidi Kaos Carbon Cycling Shoe - Men's on January 15, 2020
Familiarity: I returned this product before using it
Unfortunately these were just too narrow for me. For reference - I have an old pair of Sidi Genius in 47 MEGA that I can wear with a thick sock. I also have pair of Giro Techlace in 48 that will be worn with a thin wool blend CEP sock. The Kaos in a 48s that I tried was just too narrow.
Fit aside they also look / feel like a fairly cheap shoe. Am convinced that you can do much better for the $300 price point. Even at $200 they are likely worth a pass.