I have the nice and cheap usb gps receiver from ebay and its starting to do my head in.
I've moved it around all over my car.. worked for a while on my dashboard the my lilliput started to prevent it from locking on to anything. Now its in the boot on my parcel shelf and its nearly working.
It locks on to 4-5 sats on average within several seconds but then again on averge looses its lock every now and then. Even when it has a clear view of the sky. Not brilliant when your trying to follow the route its giving to a destination.
How does every find there lock on situation in built up cities? Mines pretty hopeless, looses lock on every few seconds when i'm in Manchester city centre.
So solved the first problem of it getting a lock on, on start up.. but it just looses lock on quite frequently while driving.