Got a couple prolines and pro-D's to fiddle around with lately. Put in 3 rounds and bout 2h of field practice.
(I throw 350' max)
I can get the putters up to about 220' safely.
260' with risk of spraying
The pro-d's are getting nibbled on the rim rather quickly. Beefy, tad slower than my usual challengers, requiring more oomph from me outside of 20'
The prolines are hella overstable. Fly like a broken in breaker for me. I can hyzer them with ease. Makes for a good upshot "S" shot. Have difficulty getting them to go straight for more than 175' before they want, nay must! fade. I suspect once I break them in, the sweet spot will stay for a very very very long time. The question becomes how long will it take to break them in? They could theoretically pass as brand new after all those throws. Pretty durable material so far when compared to the D plastic.
They handle the winds well. I struggle trying to overpower them and force the anhyzer. That's more on me as a 920 rated player not being able to get a clean snap/skill. They're in the bag for now as an upshot/approach or stand n deliver type while the proline breaker is much more comfortable off the tee as the driving overstable putter.