So I recently got back from a trip to Tokyo, and I got a bus to experience Fuji-Q for a day.
This was my first time, and I really enjoyed it.
It was my first ride of a 4D Coaster, and it may be my favourite coaster... ever. It has the new S&S trains on it - i'd seen Robbs POV of it and it sounded like he hated it - but that had the old Arrow-style trains on.
Very intense, but felt smooth enough and I loved it!
I also rode Do-dodonpa with the new loop, that ride is crazy - the launch is so intense, and the entry to the loop is so forceful because of the speed.
Takabisha was a great example of a Gerstlaurer, and Fujiyama was a pleasant surprise, my first TOGO and I thought it was a solid coaster.
EDIT: Also the operations are as bad as everyone says, but we rode everything and got re-rides on a few coasters fine - we visited midweek and arrived after opening and left before closing. It's possible!