Ability to properly use a double trigger parallels the ability to drive a manual transmission vehicle. Once learned, for a normally coordinated person, it is never an issue going forward. In the field or on targets.

Actually a double trigger offers an advantage beyond reliability and instant choke selection. That is that a double trigger mentally separates the process of firing two shots and prevents throwing away the second barrel. Other than very cold weather it has no disadvantages at all. A single trigger is no faster than a double trigger despite many folks thinking it is.

If not learned early either a manual transmission or a double trigger is normally and incorrectly considered difficult or a handicap.