Those stories are about as old as I am.
I'm please to say that although they are a little grey around the edges, for the most part they hold up fairly well (just like me
). A lot of SciFi looks laughable after only a few years, so it's good to see stories in the 50+ year range which are still well worth reading or re-reading.
Happily, my Saberhagan books were carefully packed early in the great "box up my library" event, so are nearly all in the same plastic bin instead of being scattered. Maybe I'll nibble my way through all the rest of the Berserker short stories and novels I have in order of publication.