Omni directional wheel/robot wheel

Dear friends

I am working on a soccer robot for robocup
competitions. I have found some interesting omni directional wheels for
my robot which has some significant advantages. It is thinner and
lighter than the most of the other omni wheels. Moreover it has a good
friction and I could move my robot very easily and efficiently.
I want to suggest you to see these interesting omni wheel
the website is :
does anyone have use them already?