I use dired with helm a lot. Let's say I want to go to /foo/bar/baz folder. I press C-x d to start minibuffer prompt for directory. I type /f and I get 5 suggestions. When I C-n to the one that I need I don't know which key to press to use that suggestion and keep typing the rest of the path. Pressing Tab gives sole action, which is the same as just pressing Enter. It is time consuming and annoying to have to type the whole path.