I am a Zumba Fitness Instructor and love teaching in these.  They are light, supportive and have very little tread on the bottom so I can twist and turn as needed.  The only reason I didn't give them 5 stars is that I would like a little more cushioning.  I ordered my regular size and they fit great.  The brand is specifically designed to give you a little more room around the ball of your foot, so if you have feet that are a little wider they will be great but narrow feet might find them too roomy.