I know there are plenty of threads saying the pluses and minuses of the different GPS apps.  I was just wondering if anybody has used any of these apps around the DC area?  I know different apps really vary based on where you are.  If I'm driving down an interstate, I would expect every GPS app to be able to handle that well, but how about city driving?  Sometimes you have to make a lot of quick turns so any delay or loss of gps signal can really throw you off.  I have a stand alone TomTom unit that is starting to get a little dated and I'm thinking about upgrading.  Also, do you really have to mount it to your window for it to get a signal or does it work fine just sitting in your lap or in the passengers hands while driving?
	
		
			
		
		
	
				
			 
 
		