It's been finding me my car for more than a year (two? Maybe three) based seemingly on how fast I've been moving, and when I switch to slower speed. It usually thinks that busses are 'driving' and tells me where I parked them after I get off
Well, it took more than a few minutes. It was hot as hell, girlfriend was getting pissed off at all the walking around in the heat and humidity (was in Key West), tensions were rising...and I remembered that stupid parking location thing I never use. Got me back on track within a minute or two and that wasn't the day we split up.
But yeah, seems like a decent extension of this feature for those who don't use Google Now (or whatever it's called now) or want more options.