Pros:
Very fast. Light. Good ergonomics. Easy "Slug Select" operation.
Cons:
Pricy. Can be ammo-sensitive (may not cycle reliably with lighter loads). Sensitive to adding additional equipment (e.g. sidesaddle, tac light). Some say it recoils harder than, say, an 11-87 (although it doesn't bother me). Possibly more prone to breakage with heavy use.
Although I have listed more 'Cons' than 'Pros' I love mine!
John Francis