Vintage mode pretty much sucks for any proficient vim user. It implements only a fraction of the commands, and doesn't integrate properly with ST's features. The most obvious flaw for me was that insert mode doesn't record any text generated by ST's completion, so if you try to repeat the action, you get the gibberish you actually typed.

Don't get me wrong. I love ST, and Vintage mode was what convinced me to try it. But ultimately it was far more frustrating to have only half of my muscle memory work in Vintage than it was to just learn the ST way.