Until first signs of wear show (small cracks on the chrome finish) you can use them regularly for over a year. Here are the advantages:
+ Works great
+ Durable *
+ Tasteless
+ Low price (compared to "normal" spouts)
+ With clear water very easy to clean (which in "solid" spouts not always the case)
(If it bothers you, the Drop Stop needs to be replaced) = after a few months, however, show up fine cracks on the surface