>Kathryn,
>
>Do you use that surface for kickboxing and/or step? I'm
>curious to know if the puzzle mats are stable enough for those
>applications.
I haven't done much step lately, but I did the other day, and they're fine. I kickbox all the time on them.
As far as "stable,"do you mean "won't move"? If so, the "secret" I've discovered is to just cover the whole area, making sure there is a solid support (a piece of furniture, like my sofa, a wall, a pile of weights) around the outside of the mats so they won't shft).