Who uses a grip with the D7000?

The last couple times I've been out shooting for longer periods of time, my right hand has started to cramp up just a LITTLE bit when using the D7K with the Bigma mounted. Nothing I can't deal with, but a tad annoying.

So, I've started to think about adding a battery grip. PURELY for comfort, and balancing bigger glass, I don't need better battery life.

I'd like to hear some opinions from D7K users that use or have used a grip with it.