Now that I've had my Sure Shot for awhile, I think I definitely have developed an opinion on this issue.
Sure Shot is a reply machine, not an AAB. In my home environment, I would much prefer it if Sure Shot was an AAB pin.
I'm finding the pin to be very addicting. It's getting more play than anything in my collection. But I think it would be even more addicting if I got an extra ball every time I collect the special instead of getting a "free game". My non pinhead friend is loving Sure Shot too (he's as addicted to it as any pin I've had in my collection), but even he asked what good it was to obtain the goal if you only get a free game?
I still love getting that knocker to fire for the free games, but to me it would be a more rewarding if those signified an extra ball, which would give me another shot at increasing my score.