This is a versatile shoe.  I can wear it for every day things such as running to the store or for workouts such as riding my bike or for high intensity interval training.  I have flat and wide feet.  This shoe fits snug enough so that my foot doesn't slide from side to side and gives me plenty of room so I don't feel crammed.  This is a great shoe.  First learned about it in fitnessmagazine.com