Product review (5 stars): Instantly get things done with very little effort
When my filter ran dry in the fridge, I simply whipped out my iphone and google searched the name and model number of the filters I needed.  Within 5 seconds I bought them on Amazon and they will arrived at my door 3 days later.  I didn't even have to get in the car or go try to find them.  This revolutionizes the way I shop.