Never had one, but it is an interesting looking piece.  In my opinion, its just another oversized handgun and of very limited practical use.  Basicly like a very high quality, high tech, semiauto Mac or Tec-9.

As for the manuals, try contacting Styer - they will probably send you one for free.  I've never done it with Steyr, but other manufacturers I've deal with have been quite happy to send out manuals for their guns.

Sorry HR, I didn't mean it like that, just that IMHO its somewhat like a MAC pistol or Tec-9 in that its just a large, oversized pistol.  Nothing wrong with SPP, but its not the kind of thing you'd carry concealed or that would be as practical as a 'normal' sized pistol like a Glock or a Sig.  Its an interesting gun and an interesting design though.  If you're just looking for something a little different and out of the ordinary, it will fit your bill nicely.