Product review (4 stars): Easy to install; improves the flavor
Bought this in summer 2014 after moving into new place and seeing a notice that the filter was due to be changed in December 2007.  A little overdue I'd say.

I was a bit concerned it'd be tricky to install requiring removal of the round cylinders and carefully matching up things.

But it was extremely simple.  Unwrap, slide out old, slide in the new.  Hit reset.  Try a couple glasses of water until the charcoal disappears.