Hi, I have tested blindsquare and Ariadne in downtown Minneapolis. What I find is that they tend to identify the pois I am passing, but misidentify streets and sometimes the direction I am traveling. When I owned mobile geo, it frequently got the names of streets I was approaching and the direction I was traveling correct. I am tempted to conclude the gps unit in the windows mobile phone I had was better than the gps in my iPhone. Are Bluetooth gps receivers more accurate than the iPhone built-in receiver when working with the seeing eye app? Just curious. Thanks