Replying to Canon 7D. Is it worth changing over?

im considering swapping out my nikon d100 and canon hv20 for a 7D.

I love the way it looks filming, and takes amazing photos.

I searchbarred and found a bit of stuff but not much.

I was just wondering any opinions on it, and experience?

Can you autofocus while filming or is it strictly manual? And how easy is the shutter speed to change?

Thanks