Besides reliability, the problem with the butterfly for me was the close inter-key spacing. It was too easy to hit the next key over while I was typing. I kept

Besides reliability, the problem with the butterfly for me was the close inter-key spacing. It was too easy to hit the next key over while I was typing. I kept having to back up and retype. it took most of the last year before I, mostly, got used to it. The travel or stability was never a problem, but then it was never a problem on the 2014 either. :)