Don't use arrow keys, it shifts the center of gravity when typing. You want to use hjkl for movement, even better, try not to use hjkl at all and use movement commends such as w b e etc for movement.

First thing I do when setting up vim. 1. unbind arrow keys 2. bind jk to Esc 3. Set up tmux + vim integration with clipboard / mouse support

Love the new MBP the keyboard is great to type on.