Just got 5DMkIII

I just got a 5d Mk III via the ebay deal and Adorama. I had sold my 7D back in May in anticipation of getting the 5, but got a bit daunted by actually plunking down $3500 for a hobby. When I had a chance to get it for $2750, I jumped. I have been using a Sony Nex in the meanwhile, which is a fine camera.

So far, the first thing that has hit me about the 5 is how heavy it is! I assume one gets used to this.