I currently have 11 geese, in total I’ve had 20 geese, most of which are French Toulouse from Metzer, followed by Buff from Metzer or McMurray, and Classic Roman from Metzer.
The biggest Pro with geese are their personalities.
Geese are all individuals, they are amusing and wonderful little characters that are incredibly loving and loyal when a person takes the time to bond with them.
Other pros.
Very high social intelligence
Trainable
Excellent memory
Good parents generally
Big eggs
Good grazers
Generally healthy and disease free
Intimidating to some
Scares strangers out of the yard
Not as messy as ducks
Feces wash away easier than chicken feces
Observant, can spot aerial predators easily
Can deter hawks
Cons.
Possibly lower problem solving abilities compared to most chickens
Varying degrees of aggression in breeding season, quick to anger in breeding season
Sometimes destructive to plants and other things, depends on the individual
Is considered loud and noisy to some
Can be hostile towards other species of birds
Poor defense capabilities
Will not protect your flock from most ground predators
Vulnerable to anything raccoon sized and up
Intimidating to some
Nearly impossible to find a vet willing to see and treat geese
Very little medical knowledge available for geese compared to other species