I have two of these "leashes" and I really like them. I am like you and use them for safety reasons. Last summer I had 2 in the double umbrella stroller and 2 walkers. I wrap the leash part around the handles of the stroller, one on each side and they are asked to hold onto the stroller as well. There are times that it gets tricky (narrow side walks, meeting other people on the sidewalk etc) but for the most part it works beautifully! I also have used them with 2 in the wagon and I hang onto the two leashes and let the kids walk ahead of me.

I have had a few parents who have said they wouldn't personally use them but they understand why I have to use them and they are okay with this. They would rather have their child "leashed" than darting off to the street!

I do think one of the cons to these though is that it gives the child a lot of freedom. When not using the leash, I ask them to hold onto my hand and some of them don't want to do this until I firmly tell them there is no choice. So I do see why some might not like them. This is why I ask them to hold onto the stroller.