Hey I have a KCS too :-)
Everything will work perfectly on the PC side, don't worry.
On the Amiga side you can use it as a 512 kb ram exp. and there is an additional 512kb to be used as RAD ;-)
The problem with mine is that at some point something went wrong with it and when I activated the PC part, it would write things upside down. I.e. The top row would be printed at the bottom of the screen, the second one above that, etc. :-?