I've had my D4 since beginning. Love it and have not experienced problems to date. Have done one firmware update. Went fine. Tired of reading about threats to jump ship because of problems. Nikon has had great line up of cameras and lenses for me. I enjoy using Nikon more than Canon (I had started out with Canon) -- but that's me. If you like Nikon - stick with Nikon. If you like Canon - go with Canon. Use the system that works for you. Problems happen to either system. If yours has a problem, take back to seller or send to Nikon.