Just picked up the III-C model while in Japan. Haven't had a chance to play a round with it, but I took it out on the putting green and it put a great roll on the ball and it was very easy to line up. Can't wait to play with it this weekend.
Overall, the putter was a bargin as I bought it for about $120 from a store in Japan and brought it back in my baggage, so no shipping.
Very cool. Will post again after I give it a good workout on the course.