I aint got one, wish i had though, but i have a friend whos got one. What you having problems with? The GPS aint quick, you'll have to bear with it 5 mins the first time you use it as it takes forever to find 3 or more sats, its pretty quick after that though.
I think operators are different, but have you installed the map software as my mate had to? Whatever you do, when it prompts you to update or download maps, DONT. it will cost you a fortune...