I have the Nike Method putter.
I will say that when I replaced the Redwood with the Nike I hated it. The 10 foot scale versus the 15 I didn't care for but over time I have found that the Nike works better for me than any other putter than I have tried.
Putting in WGT is much like putting in real golf, it is all about feel. In real golf I am a lag putter so I am used to figuring the break based upon a ball that barely gets to the hole. In WGT I putted this way for several years and was a bad putter, my numbers were about the lowest in my CC. I talked to a few good players and they suggested that I change my style to a more aggressive approach, make sure you go 2 feet by the hole if it doesn't go in, on short putts of say 3 feet, I was hitting them to go 3.5 feet, now I hit them to go 5.
This takes a little of the break out as well and has improved my putting a good deal and it came while I was using the Nike so maybe that makes me somewhat prejudiced. I'm now about an average putter in my CC, a good improvement.