From what I had read I expected to be blown away. I am impressed but not quite blown away because there is a LOT of grain (or is it the term snow?) throughout.
I understand that old film just won't look as good, but I also have the older James Bond movies on bluray and those look spectacular! I can put my face right up to the screen and those movies look like an oil painting. No hint of grain or pixels. Maybe the original film stock was better for movies?
The grain is important. Nothing
shot on film should ever look like an oil painting. The worst BD transfers are the ones where the grain has been scrubbed away to the point where people look like wax figures. Of course, having said that, balance is the key. I think TOS-R probably had the balance right.