>>38513866x9 is the largest standard roll-film format. It's more difficult to print or scan than 6x7 or LF due to the film curling, especially for edge negs.
Like 35mm, 6x9 does not fit with equal boarder edges on standard paper sizes (eg 8x10in).
You're stuck with one lens only, albeit a very good one.
It's large, but within standard size for MF. The other posts are exaggerating, it's actually quite comfortable to use.
I remember hearing that Fuji cameras from this era are difficult to repair, but this could be hearsay.
There really are not many disadvantages. The Fuji RFs are still a great value unlike some other cameras of its class. I say go for it.