Instruct: Classify the given review into positive or negative sentiment.
Query: Locked down

I purchased these after Safety First failing miserably in our house. I have a 4 yr old girl, a 2 yr old girl and newborn baby boy. Maybe I haven't left them alone long enough with these or they haven't been desperate enough to get through the door, but after 2 months, they have yet to open any doors or disassemble these locks. I'm thinking the size of the doorknob has a lot to do with how easily you can open doors with these. Our house has cheapy, smaller, fully rounded doorknobs, so sometimes it's hard for adults to open doors with these. But I'm willing to deal with that if I know my kids are safe.