I have only done an outdoor shoot with studio flash, and in 120. As you said, all the above, it's so fine grain i had to judge it by eye to see if I was in focus when using the grain focuser.
I tried to finish the roll inside with a 1/2 second f/2.8 exposure. It was terribly cyan. Which made me come to the same conclusion. Outdoors only. :P
But with sharpness, I came across a pretty acceptable amount of sharpness and was rather happy with it. I also printed on 11x14, and some 16x20 of it.
What I'm anticipating now is printing my Ektar 25 film that's been frozen since '94!
Ektar 100 is exceptional, I still have 10 rolls left I'm waiting to shoot!