With the exception of my first 35mm camera back in 1968 I've had motor drives on all my 35mm cameras and like the feel of a larger camera. So, when I got my D7000 I immediately started investigating the grips available on the market. If you go to Amazon or B&H or Adorama you'll see that you can purchase the Nikon grip or an alternative grip (for significantly less). I purchased an alternative grip and am extremely pleased.
If you do any multi day workshops and find yourself getting up at 4:00am and getting back to hotel at 9:00 or 10:00pm you'll like the idea of having two batteries!
If you like a smaller form factor don't get a grip as it does add bulk to the camera.