The Foma 400 is wonderful film, and depending on what developer you use, it's either somewhat grainy, or very grainy. It isn't very sharp, though, and from that standpoint it reminds me a lot of the old Agfa APX 400.
I personally like the tonality I get, and it prints very well in the darkroom. I don't use it because of the backing paper; it feels as though it wouldn't be as easy on the film back and transport as that of Kodak, Ilford, or Fuji film would be.
It's not a bad film, just not a favorite.