Good video TWOMINUSONE, I thumbed it up. :)
Apparently the Rossa is the putter of choice for 'ding' putters so I went ahead and rented it. After a single 9 on the flat greens of BP, I was very, very pleased with it's performance. Long putts: held line as well as the 70 Versa. There is a penalty for a missed ding(as it should be) on the 90/150 scale but it does seem less severe. Short putts: I made all 10 footers and below, save for one which was a gross misread. The ding-miss penalty on the 15/30 meter seems almost negligible.
My last round at KIA with the Versa was pretty bad. Thru 5 holes, my longest putt holed was 2.8 feet. Just couldn't get a ding...and made nothing as a result. Started hitting the putts more solid and one putted the remaining holes. It seems like you at least have a shot at making it with the Rossa on a mishit. The Versa may as well have 1 dot forgivness, it really isn't very forgiving.