The accident rates during training for engine failures in piston twins used to be awful although they are much better now - google Dick Collins.....
Has anyone posted the link to the EASA funded QinetiQ report, plenty of stats in there if you are interested.....
http://www.easa.europa.eu/system/fil...0Issue%202.pdf
I have to declare an interest. I used to work for Pilatus and always felt comfortable flying in any of their products over the Alps - by day at least.