Pro:
Ballistically close to the .44mag
Recoil is not as severe as a .44mag due to the comp.
Impressive stopping power
Can still shoot .45acp through it. HOWEVER you will have decrease accuracy and poor cycling due to the heavy spring.
Con:
Not much of a carry gun due to the size, weight, and comp
Harsh on the frame and slide
Inial costs for conversion kit, reloading dies, brass, etc.
LOUD (this could be either a pro or con depending on your preferences)