I was excited to use this for better quality geocoding, as the Google Maps geocoder doesn't seem to know of everything in Google Places, but it seems that is forbidden by TOS -- it's still developed around the idea that you request the place list and forward it to the user right then and there, never storing it.
If you're curious about what sort of thing you can't find through the Maps geocoding API by name, try searching for "madison square garden." It's an iconic venue for NY, and yet, just not available. In Google Places, however, it comes right up.