It seems to me, having experienced Spydercos in 3Cr, 8Cr, GIN-1, N690Co, VG10 and S30V, that the Glessers really know how to treat a steel. Maybe it's due to their mule team (which is an excellent concept BTW) or maybe due to their long time in the business but I never read of them messing up the heat treat on their products (unlike some other manufacturers). For me, this is more important than anything else as while I can put a new edge on a blade (my Spydercos have always had good edges) I lack the ability to do a heat treat.
I like the Glessers and their products, mostly due to the fact that they always deliver what they promise. Paragons of capitalism and model businessmen, IMO.