"when it worked, it worked" is one of the weakest excuses possible, and one Apple themselves railed against many times. Not working at all (ie: broken) is quite worse than not working beyond perfectly.

Who cares if you can't press a key on the very edge, as long as pressing in the proper spot _always_ works? The one that did accept blatant mis-presses was broken often enough to completely overwhelm any benefits, because it can't accept _any_ presses when it's in for repairs!

"I like the keyboard that let me be a bad typist, even though I had to get it replaced 3 times, and that lack of robustness actually interfered with my work." Are you listening to yourselves?