The Saucony Guide 18 running shoes offer good comfort, support, and performance for many users. They are described as lightweight, responsive, and able to accommodate custom insoles. The shoes provide excellent stability and cushioning, making them suitable for long runs and recovery workouts. However, some customers have reported issues with the outsole wearing out prematurely and problems with the upper construction. There are also comments about design changes from previous models, with some preferring the look and fit of older versions.