Save on homeowners insurance by having impact windows and doors throughout entire house. 
Non impact windows are single pane tempered or annealed glass that can break relatively easy where as impact windows are laminated with 2 sheets of glass and a plastic coating in the middle of the 2 pieces. 
Some key factors in determining which solution is best for you are:

1. Product Selection
2. Product Cost
3. Product Design & Appearance
5. Longevity

Impact Window Test: