I received a sleeve of Test golf balls about a week ago and used them instead of my usual Pro V1. Wow!! less side spin, more distance and terrific stopping power on the greens. I played the same ball for the last 36 holes and it looks as though it just came out of the box. The best description I can give is longer off the tee, less spin more control and durable. Loved them. I don't know if it is a prototype for a new Pro V or something else. Whatever it is, I'll be using them.