I use a dSLR and the historgram function to fine tune flash exposure. Not that I do a lot of studio flash work, which is why I sold my Minolta Spot F that used to do flash. And you still need to know how the histogram/ISO setting is going to translate for whatever film/developing combo you're using, but it's the same problem if you use a flash meter. I just find the histogram gives me a better idea than taking a bunch of spot readings.