The Panasonic G6 is a good camera for pro shoots. I'm shooting a company promo video on it tomorrow. The stock camera is not ideal for low light indoors, so you may need extra lighting Great footage when using primes.
I record sound separately as you can't adjust audio levels on the G6.
I never use autofocus so can't comment on that. Wouldn't recommend trusting it on any camera for pro video shoots.
The G6 is straight forward to use but you do need to familiase yourself with it before shooting.