I'll never use an different pad again.
I've tried a few different brands and these are by far the best. they absorb the urine perfect and don't leak to the bottom (at least not right away). of course if you leave it there for a long time and there's lots of urine any mess can happen. however other brands i've used i've ended up having to clean up urine underneath even from one visit and less than 5 minutes have past. so what's the point in having a pad then, right!? i even notice if they do potty towards the edge it still manages not the leak out. i'm only buying these until my little one finally understands that outside is the best place to potty. :-)