Kathy's Outback has a push-button e-brake that has a "hill-hold" feature, a separate button from the regular e-brake button.
Once pushed, the "Hill-Hold" does just that - When you come to a stop uphill (foot on brake pedal) you'll hear it engage (zeeuuuoooopp!). When you release the brake pedal, nothing happens until you push on the accelerator and then it releases (zoooouuuueeeepp!) It's still "on", waiting for the next hill to repeat the process.
She never uses it, while I've used it from time to time and it's pretty neat, especially when we're driving in Worcester, the city of seven hills. It's like a very mini San Francisco, with some hills just as steep.