They are an improvement over the Tour Series with the weight savings, sub 50g whereas before they were 95+. Took a little getting used to the huge weight change but it was a good change. I use them on driver and have tried on fwy wood (jury still out on that). Eliminates the lefts for me. I use OS on the rest of my clubs and a medium or large on driver. They are both a LOT bigger than a +1/8 OS (lamkin). I was concerned the UL would be Winn squishy but they are not. They aren't squishy at all but not super firm either, somewhere in the middle.