As a fellow G35 user as well, I agree with DMC's take, a lot of it is dependent on your lighting, lens and your composition as well, There are shots where grain can enhance the shot and make it more gritty, if you want a older , grungy look, like for Flashback, but you would'nt shoot a white wall. What camera are using it with?
I think testing is right on. And 5.6 is a good point to keep in mind. I haven't settled yet on the camera package, but I anticipate HPX170 + Cinemek. I am just attracted to the idea of a rock solid system with no moving parts. And I know I will tend to favor a greater depth of field, hence stopping down. (Yup, lots of light needed.) But the organic quality of the 35mm adapter is preferred to the bare video lens.