I used to have a double prong years ago, and I prefer my lever belt to the prong belt. It saves time and effort. In between sets, you don't have to take it off. You just flip the lever and it's relaxed. So you can take a breather in between, then when you're ready to go again, you flip the lever again, no having to yank and pull to get it tight, or no needing to have your partner help you get it tight enough.