The best thing I like is this model has two thumb wheels, one on the back of the
Nikon D7100 camera right above where your thumb will naturally go, and one just below the shutter button where your index finger will naturally be, so you can use the back one to adjust shutter, and the front to set aperture, this makes it extremely easy to use in manual mode, so easy in fact I almost always shoot this way.
The
d7100 other than processing power really is a completely different camera, I love it, very Happy. I use this camera both commercially as well as just plain fun.