@Sonnyb2 - the main reason for using it is that it takes effect in far less time than Novorapid or Humalog for most people. You can bolus as you eat rather than well before. There is a significant minority of us that, after longer term use, have encountered problems with it though.
Have a read of these: http://www.diabettech.com/Fiasp
After longer term use, there are quite a few people that have developed site issues, seeming resistance to Fiasp specifically (it seems to act less Le water in some cases), pain on bolusing, etc.
It looks like either a local site reaction to the additives, a liver related reaction to the additives, a bit of both or something else.
Back on Novorapid.Sorry to hear that Tim, after such a very promising start. Have you stuck with Fiasp, or swapped to something else, post the issues?
Back on Novorapid.