The Italians make some pretty good knives these days.
So far I like the N690Co steel, it seems a bit like 154CM, maybe better.
I bought the Tops because I wanted to try the steel and the brand, so far so good.
This knife is very thin and light for its size, it reminds me of a Strider in that respect. It is proving very durable. I like G-10/titanium handle framelocks, I wish more manufacturers would offer this construction. As far as the clip goes, I prefer tip up, but I have carried both kinds for so long that it doesnt bother me.
The Extrema Ratio has a different blade shape than any other folder I have.
The whole execution definitely shows its military roots. This is not an American design, thats for sure. The liner lock-lock, works as advertised.