I don't know about the valves themselves, but I hate hose clamps and barbs. I have used them many times throughout my career and I don't trust them because I have had too many problems. I switched to a manifold with flare fittings and have gone with Duotight and EVA barrier tubing (almost) everywhere and am very happy. The only place I didn't get rid of the barb and clamp was on the output of the regulator. I didn't see any reason to toss a good regulator so I have a short bit of hose that converts from the barb to a flare, so there is one hose clamp left in my system. It is in a place that doesn't get any flexing or stress so it has been fine, but someday I would like to be rid of it, too.