Used to use Mapquest exclusively, but have recently switched to Google maps. The primary reason is that they offer several routes to choose from in most cases. Mapquest is still a good site, especially if you log in so that it keeps up with previous searches and remembers your "home" starting point.
Better, cleaner, much faster than yahoo maps. I panned in Aerial View through Como Lake Park, right next door to me, and it was dead accurate. I walk in the park every day, and I could follow my route.
Use MapQuest for driving directions and maps. See local traffic and road conditions, find nearby businesses and restaurants, plus explore street maps and satellite photos.