Mike DeWitt of 10th Planet Springfield hits this takedown in a couple of these 10th Planet Qualifier competitions that I've watched. Nevertheless seeing it yesterday while doing cardio film study reminded me of how much I like the set-up. The footsweep attack incentivizes the opponent to lift his feet and remain as vertical as possible, opening up both the space and the timing for the double leg.
DeWitt has a nice double leg without it. But with the setup, it looks like an especially potent way to get the fight to the floor.