not very good.
I like Richard Widmark,I like spy films but I don't recall ever seeing this on tv(in Britain).
Watching it I see why it is not often on tv,it is black and white and not very good.
It is not an awful film but it is not as much fun as HELL AND HIGH WATER for example,or THE PRIZE or TORN CURTAIN.
I say it is not that good despite the fact it is filmed in VIENNA which is one of my favourite cities.