I have used them also. They are not bad.

Here are some more of my comments on them:

• They seem to be a bit expensive
• I have not figured out a way to hit them with my driver. The point being, how do you tee them up with the tubular shape they have?
• They get dirty quickly and seem to be hard to find in the grass (a pretty picky gripe, I guess)

My two cents worth....

Chessbum.....