I've pretty much tried all the rescue methods but I like these the best because you are pushing in the rescued boats forward so it's faster and the boats stay drier than dragging them backwards snagged by the fin or rudder. The towed hook can also get snagged in the weeds or pull the tow boat under as well (done both).
The only problem was riding up over low floating riggers but that was solved with a short rod pointing down between the arms. It works great for snagging cowls as well, even managed to bring it a .12 rigger cowl with it. We've been using these for 5 or 6 years on practice days when the tennis ball won't reach and they have never let us down.