I have a good friend who firmly believes that you get what you pay for...in this case, the more expensive the putter, the better it is...some on here seem to support that thinking. A few have also mentioned some very gifted players who effectively use "average" putters.
I believe that each person's comfort level with the putter, and their ability to read the greens, will always trump the number of dots on a club, or the price of it.
Alas, like Lily, putting has never been my strong suit, but I am level 105 and have played many people who use all sorts of putters...some of the very best I've played against still use the Rossa, or the basic spider, or the level 70 versa...hell, some still use the starter putter...it's what they are comfortable with....and they sink almost everything using them.
point being...money will never buy talent ...and the most expensive clubs don't guarantee a damn thing...except a lighter wallet.
my .02