The floor where I do my cardio is made of the anti-fatigue rubber matting.  My workouts normally consist of some type of dance/martial arts (I especially like TurboFire). I do my cardio in my socks so it is easier for me to pivot and turn.

Recently Ive had lots of pain in my left foot.  The doctor recommended orthotics and pain medication until the swelling goes down so we can get xrays.  I refuse to stop my workouts and it is impossible to wear insoles or orthotics in socks....so I searched high and low.  I came VERY close to getting Vibrams, but saw these at a fraction of the price.  I am very pleased with my purchase.  I have been using these for almost a week now and am able to workout pain-free. (The rest of the day is a different story.) They hold my foot perfectly to take pressure off the heel even without my insoles.  They are flexible making it unbelievably easy to really point your toes.  I am able to pivot and turn probably even better in these shoes than I could in my socks.  I can see why so many people say these would be great for Zumba! I'll have to try that workout soon!

Lots of reviews that I have read said to purchase the shoe 1 and 1/2 sizes bigger than your street shoe size.  I am a womens size 10 so I purchased the 11.5, they are a bit bigger than Id like them to be.  The fabric seems to even relax after theyve been worn.  When I am ready for a new pair I will purchase an 11.  I Highly recommend these shoes!