I've wanted my iPad to have GPS capability in order to use apps that rely on location data (such as TripAdvisor) and mistakenly bought the WiFi only version, thinking it still had a GPS built in. I've since returned it for a 3G model, and keep the cellular option disabled. I've noticed though that it has trouble finding my location indoors even though my iPhone had no issues, so I was thought maybe my iPad was defective. When I brought it outside though it immediately got a lock. I thought maybe the ipad had a weak GPS chip, but then I realized it wasn't using the assisted GPS feature because that relies on cell tower data, unlike my iPhone, which is why it could still get a signal indoors when my iPad couldn't. Just to confirm, I disabled the cell signal on my iPhone, and sure it enough, it couldn't make a lock until I brought it outside. I never knew what a difference assisted GPS made until now. Hoping my experience will help those of you who own the 3G models but don't use a data plan.