I have a Nikon D700 along with a Solmeta DP-GPSN2 GPS unit that I've had for a number of years now. This is the second Solmeta unit that I've had - the first was replaced under warranty. Now I've got a problem with the Solmeta in that it appears as though it's battery will no longer charge or hold a charge - I have to run it off of the camera's battery. Also, it seems to take a long time (upwards of 2 - 3 minutes) for it to locate itself on from the GPS satellites. I like the idea of having the GPS info, so would like to replace the Solmeta, but don't know whether to go with another Solmeta, or another manufacture.