Product review (5 stars): Great at preventing flooded basements!
I am replacing the hoses on the washer at my mothers home.  The rubber is cracking and if one blows it might run for a week before it would be found.  These were recommended by a friend of mine who use to be a plumber.  The extra protection just makes sense to me and they are so inexpensive it does not make sense to me not to use them.