Google Now is amazing technology. Amazing. It is my main interaction with my phone: navigation, text messaging, calling contacts, starting Internet searches, looking up business phone numbers, etc.
For travelers, if you put a quality formatted destination in the LOCATION or WHERE field of your calendar app, then Google Now will read your calendar and pre-populate itself with a calculated route to that destination, complete with an overview map and the time needed to get there from wherever you are right now (including real time traffic delays). One click on the Navigate icon and it starts navigating.
PLUS, Google Now can notify you before each calendar appointment and tell you what time you need to leave your current location in order to arrive at your future destination at the time that is in your calendar.
The location field in your calendar can take several forms:
1) Place Name, City, State
2) Street Address, City, State
3) Place Name, Street Address, City, State
For #1 it has to be specific. You can't say "New Orleans Airport, New Orleans, LA." It will take you to a small private airport near the lake. You have to say "Louis Armstrong Airport, Kenner, LA."
If you use Gmail, it will read your flight confirmation emails and populate itself with updated flight status information before your flight. It will also show you weather at your destination automatically.
It is an indispensable app for people who travel and have a lot of appointments that they drive to.