Beside Ryu, Ken and Chun-li, who appeared together in most Street Fighter games, Guile is often considered the fourth most popular character. He represents both the military fighter and the American man and was designed to be popular in the west. Guile also created the concept of a turtle character: one who waits for the opponent action while pushing him away with projectiles and crouching move.
Guile is a charge character, which means he must hold the opposite arrow before pressing forward (or up) and either a kick or punch. His famed Sonic Boom is performed with his punches while his Flash Kick is performed with his kick.
Guile destroys CPU. It is because he can easily dizzy and even re-dizzy with his huge tirade of combos. His slow Sonic Boom, with arena control, can lead to catastrophic result to his opponent. He can easily chain it along with his flash kick. He also has a very fast standing jab that can defeat his opponent without him being able to do anything. He also has anti-air move and two damaging airs throws.
As a side note, the CPU Guile doesn’t have delay in his special move. As soon as a Sonic Boom is gone (or hit his opponent) he can perform another one or a flash kick immediately, causing frustration for the player since a human player can’t do this.
TAS tools were used to make this high quality playthrough video.