My only lament in buying the D800 was not having the extra $600 to buy the grip and L plate. Now that I know the battery cover pops off easily, I am more dismayed, because the grip solves that issue.
I have become so used to shooting verticals with my elbows tucked in, that I don't know how long I can survive without one. It just feels right with a grip. I AM enjoying the reduced weight somewhat. With all the other gear I tote, it's not a factor when considering my load out.
Scott Chapin Powder Springs, GA, USA Nikonians Team Member