It's me that MIKEC4 above has reported on.

I bought the K12 when I returned to pistol shooting after a very long lay-off. I tried a number of different pistols belonging to members of our club but settled on the K12. I don't regret my choice, it performs exceptionally well (I've already managed a couple of 50's). The sight adjustments are very easy and well marked (so no need to refer to the instructions every time you need to alter them-which doesn't apply to a lot of other pistols!). The grip suits me well, although I can see this as individual choice, it may not suit everyone but which grip does? The balance is good and considering its weight it feels surprisingly light. The trigger has plenty of adjustment and is consistent and very smooth.
Other adjustments are pretty simple but the instruction manual could be a bit better.
All in all I can recommend this as an excellent pistol.