I love the camera- I actually owed a Fuji 680, then moved up to a Fuji 680 GX III years ago.
Not only can you change the back for digital, polaroid, or film (usiing 120mm or 220mm film), but it also has bellows movements for selective focus and some perspective control.
I use it in the studio, in the field, have travelled with it around the world, and the large 6x8cm (2 1/4 x 3 1/4") negative provides so much detail.
Yes, it's bulky and heavy, but the additional weight and set up time is worth it for me (depending on the type of imagery I produce).
I love 35mm, and 35mm digital, & have used everything up to 4x5 & 8x10, but this is close to being my favorite of all.