Something to watch for is scale factor. I've had one where the lot was 5cm bigger than plan, and would have had me stake the building as if it was 2cm bigger if I wasnt on the ball. Creating a point in the collector 5cm out and localizing on that instead gave the same effect as if I was using a total station and stacking off the sideline. I've always setup a total station on my offset pins to make sure the dimensions and angles are ok. Definitely don't want a contractor finding sloppiness.
Generally, I've only found gps staking to be handy when there is shiat aallll over the damned site, making it a pain laying out with a total station.