I really like the gps in my iPhone, and use it a decent amount. It works ok, but could deffinatly be better. There's some lag that could be dialed out, although I'm not sure if it's the reciever or the phones proccesor that's causing it, although I would assume it's more the reciever as Tom Tom and some of the others have kits with upgraded gps kits. So what do you guys think?