It is interesting how polarizing the butterfly mechanism is. I absolutely love it. I can type more accurately and faster on it (they keys feel more stable) and I dread when I have to use an external keyboard with the old scissor switches or a pre-butteryfly MacBook. My colleagues who have a new MacBook Pro also prefer the new keyboard. The only large downside seems to be that it breaks more quickly.
Of course, in the end it is a matter of taste. It would be nice if Apple could find some compromise between the new and the old design. But Apple being Apple, they will stick to it ;).
This is like saying the Xbox 360 is polarizing. It's not that some people love it and some people hate it. It's that some people get a working one and some people get a broken one.
There's enough complaints about broken butterfly keyboards to conclude that the failure rate is significantly higher (across both the first and second generation).
Of course, in the end it is a matter of taste. It would be nice if Apple could find some compromise between the new and the old design. But Apple being Apple, they will stick to it ;).