I am looking for a map application with the following:
We actually have written our own GPS application which uses ESRI shapefiles. Periodically we get complaints from customers saying the GPS is significantly "delayed" (i.e. the icon showing current location is 2-3 blocks behind the true location).
To help isolate whether it might be hardware related or our software, I would like to test alternative applications to see if they have the same delay.
I personally used Microsoft Streets and Trips on a couple of road trips. The mid-level package even comes with a GPS receiver.