Plus once you figure out org mode and magit you can't imagine living life without them.
(Also as a humrous aside I just tried finishing this post by typing :wq! because of force of habit, I love vim)
Once you learn them, there is nothing to think about; that's the beauty. It's muscle memory - I swear (I haven't tested with an EKG) that the signal doesn't enter my conciousness, like an old violinist playing.
Yes, that only applies to things I use regularly, though they can be easily combined into larger commands. I'm not at all suggesting that things I use once a year go to muscle memory, much less all of Vim (probably only Moolenaar knows it all)!
Can't say it made me any faster or more efficient, but it sure does feel satisfying and more comfortable. And, let's be honest, it also makes me look cool!