works really well on our toilet!
No other kind would work on our toilets, this one is discreet, easy to open for an adult, and doesnt damage the toilet. It keeps my 1 year old out of the potty! It does come unstuck from time to time, we may glue it on somehow in the future since we plan to have more kids. We have 2 of these, I recommend them, its the simplest and easiest babyproofing product we have so far.