When I first opened the box and read the directions, they provide you with four cups you freeze with water that will fit into the shaver. I was worried this would not be enough but it makes a good amount once shaved. 
Easy to use, shaves ice fairly quick. But there is no difference between the two blades at all, both produce the same type of shaved ice.

Anyways this is nice to have if you make asian shaved ice desserts,  slurpess or shaved ice with syrup for kids.