The pros are trouble free operation - the fuel is clean and requires no special care or winter additives. The cons is the rate of fuel consumption - LP contains much less energy than gasoline or diesel, so uses a lot more fuel.
You still need to exercise the generator regularly. The main reason for running it is to make it heat up enough to dispel moisture from the electrical components.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL