There's a reason "Nikon GP-1 alternative" is a search phrase that finds its way into Google's simplistic query box frequently. Put simply, the only GPS add-on with Nikon's name on it is universally seen as a poor purchasing decision. For one, it's still right around $200 despite the fact that it's pushing four years old. But perhaps more importantly, it's a major battery hog and takes eons (read: four to five minutes) to get a solid GPS lock if you attempt to conserve your juice by having it shut down each time you flick your camera
