I bought Kumho Ecsta 4X to replace my Kumho Escta AST tires one year ago. Both models provide extremely quiet rides and I love how my car handles dry pavement with both models. However, the Ecsta AST was AWFUL in one inch of snow for my car. My car would fishtail from a dead stop on level pavement (even starting in 2nd gear) and go no where. The Ecsta 4X lets me drive in light snow storms, but my car still fishtails on turns, & has trouble stopping without sliding in less than 5 inches of snow. It doesn't snow many days where I live and I refuse to buy special snow tires when it snows less than 5 days each winter. I am very happy with the performance of these tires in rain & dry pavement, which is the type of weather I deal with 99% of the time.