The Gadgetophile website has published a review of this Bluetooth GPS unit in combination with a Nokia 6600 Series 60 mobile phone running Power Navigator 2.
"Coupled with Symbianware’s Power Navigator 2, the GR230 turns my Nokia 6600 into a fully-fledged GPS navigation system.
The GR230’s operation is supremely simple. Entirely self-contained, you simply switch it on, then connect to it with a bluetooth capable device (cellphone, laptop, PC, whatever). Like any handheld GPS unit, the GR230 needs to see a good amount of clear sky before it will attain a ‘Fix’ after a cold start. Once this first fix is attained, I found it did a very reasonable job of retaining a fix even in all but the worst urban canyons. The main issue I found is that when a fix was lost (e.g. on entering a building) the unit had trouble re-acquiring a fix until it again had a clear sky-view (I’m guessing maybe 25% of the sky needed to be visible). I understand this is normal for compact GPS units. On the upside, the GR230 was extremely fast to obtain a cold-start fix (~30 seconds) from the dashboard of my car in normal suburban conditions. It also has a connector for an external antenna, which might help if reception is a problem in certain areas."
