I have used various old Vivitar and MecaBlitz flash guns with my older S9600 Fuji camera and the setting up is a pain!
I have a new Fuji HS20EXR and at last there is a dedicated flash - this gun changes its settings depending on what's set on the camera, so its a no brainer, just fit and go.
There are features for more enthusiastic worriers (like wot I am some days) and the head can be tilted and turned around to reflect off walls - make sure they are whitish walls!
I also use a portable bounce screen, looking forward to fitting it.
This is good for eye lighting, just bouncing the light off the ceiling often gives dark eyes, an on flash bounce deflector does both jobs, eg Lumipro.
Good to have a high powered flash gun in my kit once again.