It's funny . . . spring straps played a big part in my becoming a DIR diver. When I was a total newbie, I went for a dive with a woman from our dive shop. She had spring straps, and I thought they were the cat's meow, since I had struggled with my fins from day one. I went to the dive shop and asked if I could buy spring straps, and the guy there (who happened to have been my OW instructor) asked me why I wanted them. I told him the story, and he said, "Oh, Jackie -- she's been diving with that DIR crowd. Why a group of cave divers from Florida think they can tell the whole world how to dive . . . " and on and on. I came away confused as to why he didn't like the spring straps, and thinking, "Hmm . . . if these DIR guys are where they come from, maybe they have other good ideas?"
So I went home and Googled DIR, and darned if they DIDN'T have a bunch of other good ideas. The rest, as they say, is history . . .