Good for the time but dated. When your negative is the big it doesn’t matter as much but it’s absolutely not as sharp as more modern constructions.
It’s also arguably a step down to use his printed body versus the original Mamiya press in terms of functionality other than reduced weight. Still an impressive design though.
https://en.wikipedia.org/wiki/Mamiya_Press
I've seen a lot of Mamiya 645 and 67 systems but those were probably from the 1980's and 90's.