I just replaced the pads and rotors on my 09 Vibe last Saturday. It was my first time, and ended up taking around 5 hours. But that included setting up my new floor jack, a lunch break, sending my wife to pick up a part I needed, and a test drive at the end. Now that I've done it once, I could probably do it again in under 2 hours.
Last time I paid a mechanic to install my own pads, it cost around $100-120, so $70 sounds like a bargain to me. Those pads were actually Wagner ThermoQuiets, and the name was not accurate at all. They squealed the entire 3 years I had them on the car.
2009 Vibe GT with 5-speed manual and shrapnel-free passenger airbag