Beyond the learning curve, I have had no problems with either of my D800 bodies. I have expressed reservations about Nikon service in the past, but I have been very successful by sending my D700 bodies to APS in Morton Grove, IL for upkeep. They are an authorized service depot. I chose not to let the issues I have had with Nikon service dissuade me from the D800. It is a great camera and the later bodies appear to have the focus issues resolved. I got my last one from Adorama and it was a very late serial number.