What part of the performance were you disappointed with? They don't last forever and they all need to be replaced from time to time. How often depends on a number of factors including how much you drive, the area you dive in, parking under trees etc. Some people don't seen to notice until the rubber rips off. I can't stand them when they start to reduce my visibility.
You do want to make sure they are properly aligned pressure adjusted and clean.
Personally I like the Bosch blades.