I have been using the Fifty since they arrived on the market a few years ago. It has a soft feel, but is lively and does not feel like a marshmellow. I like the shallow dimples which seems to make the ball roll better on putts. The cover is just right - not too clicky and not too soft so it has a good feel and sound with the putter. The trajectory is between medium and high. Some golf balls i have used tend to balloon, but the Fifty has a nice arc trajectory. The trajectory also allows them to hold greens better than most golf balls in this category. If you have used a variety of golf balls, you probably noticed that there is a tradeoff among distance, feel, and spin. The Fifty blends these nicely into a ball that behaves very well overall.
To put my review in perspective, I am a 15 handicap with a driver swing speed of about 90 mph.