Almost every Zumba class I've attended has a wooden laminate floor.  I purchased these shoes because the Rykas I had were too "sticky", and I kept torquing my knee (painful).

The first night I wore these, some moves were much better because of the slip zone, but most times I was struggling NOT to slip and slide all over the place.  There simply isn't enough of a grip zone at the very front (toe) of the sole.  Even with my toe pointed as far as it would go, there just wasn't enough rubber to keep the shoe in place.  If the shoe designer would have taken half of the slip zone and left it part of the toe grip zone, this would be a great shoe.

Also, I did have to order a significantly larger size.