you got it for under 100$? How much? If you can still return it, .... do, because I dont think Nokia's GPS unit is using the SiRF III technology.
It's like the next best thing since sliced bread for the GPS world
You should really check out the Holux 236 on ebay, you can get it for under 80$ with shipping. I got it, and it works flawlessly.
I have to admit, when I started using it for the first time, I had a lot of connection issues, but then I got used to what I should do.
Keep the device paired and authorized in my bluetooth manager. Give the GPS receiver a few seconds to connect and locate itself. Start the navigation software (nav4all, mgmaps, etc) and specify internal GPS. If its a java application, like all of them aside of Wayfinder, it will ask you if you would allow the application to access locationing information.
If your navigation software says there is no GPS connection or satellite connection, turn off and back on the receiver.
I can use the bluetooth easily more than 10m without objects in the way, but in my car, I just put the receiver in my sunglasses compartment on the cealing
You'll find the arrows and directions are very useful when it comes to navigating inside crowded cities with tons of one-ways.