we have setup a map and setup an aisle in the warehouse to test your product. after doing the calibrate the points (setup in 9ft grid squares). I go back to map view and the blue icon does not move and no where close to location. we have set up four ap's that are in a zig zag pattern and about 25ft about apart. we are doing the calibration on iPod and not iPhone so the compass does not work. When we first started it worked fine, but the only change has been moving the ap's closer for better accuracy. we are in testing the product to see if it works in our warehouse.