Pros: Can hit balls with it. Different ways to use it. Small, fits in bag easily.
Cons: No literature or instructions.
Overall it was a lot of fun. I hit balls with it on my driver and irons in all positions. Pretty neat how it seemed to change the kick point maybe? In the driver shaft. At least it felt like it was flexing differently. I foresee keeping it in the bag and using it often. One thing that would be nice would be a short "how to" book, or a list of useful drills.