My B and J occasionally stuff up. J sporadically doesn't work and then JJ happens. Sigh.
I admit it's a pleasure to type on this keyboard all day long though.
I was toroughly disappointed when I bought the $179 'magic keyboard' from Apple (the dark one from the mac pro), and found out the tech is the outdated keyboards, with 2.5x price tag!
No single key problem on this keyboard can overshadow its biggest problem: the useless arrow keys.