I made the mistake of buying many of these things to baby-proof kitchen and living room, I wish I had bought just one to try it first.
It is indeed easy to place and doesn't look too bad, but those are about the only pros.
It is hard to open with one hand, and even harder to close again.
It doesn't stick to every surface, so beware... it may be totally useless.
I've had them in place for a few days, and I keep all of the locks open unless my daughter is around, which is not the safest thing to do.
I gave two stars and not one just because it's done its job so far, but I'm not sure how long it will last.
Wouldn't buy them again.