I'm usually not a fan of most of these side content, I never cared for Zangetsu and such. I played the main game and I felt like I got my money's worth. It was very much a sotn like game, and it had a very good feel. It's a bit too long for me to play through too many times, and it has a lengthy feeling as well.
I'll probably play through it again, but there is definitely gonna be time in between playthroughs.