I am old school. Built my first trad rack in 1976 - that's a way to say I have had a lot of binners, gear, rack. These are what they are advertised as - advanced forging mono wire gate ultra light carabiners. A big/small combo draw weighs in at about the same as a single old school Chouinard D on my rack. That is a take notice savings of weight. As others have said in various ways - there is no free lunch - you loose the old school durability - the small is, well, rather small and takes getting used to. For what they are, what they are built to do - I beleive the represent the state of the art and are REALLY cool enginerring. There is a place on anyones rack for a half dozen of the small / large combo's IMHO.