[M_Six]

I tried the GPS on the 6D once at a shoot where they were using a very high end GPS setup to mark old graves. My 6D's GPS was accurate to a few yards whereas the high tech one was accurate to a few inches or less. And on a couple of occasions when I took 5 or 6 shots from the same place, the GPS readout had me at 2 or 3 locations separated by yards. It's ok for keeping track of approximately where you took the shot, but the accuracy and reliability is not there. But that day I did notice a very fast battery drain even with the grip and two fresh batteries. Now I just disable GPS.