While this is not as important as other factors, you would be very thankful if the hand blender that you have has a minimum level of spattering. It is always unpleasant to puree a soup with lots of spatters. In order to avoid this from happening, watch out for models that have openings on the cage that surrounds the blade of the blender. You would not want to have splatters on your countertop, wall, cabinets, and on your clothing.