Okay, so I was skeptical at first because my Houdini toddler kept outsmarting every lock on our sliding door. But this thing? GAME CHANGER.

Installation took like 30 seconds - no tools, just peel and stick (but seriously, WAIT the full 48 hours for the adhesive!). The clear design is genius because it doesn't scream 'HEY LOOK AT ME' on our glass door.

My favorite part? When locked, that door isn't budging even when my 3-year-old does his full WWE body slam routine against it. Peace of mind = priceless.

Bonus: It works as both childproofing AND extra security. We tested it by having my husband try to force the door open from outside - nada. Burglars would have to break the glass (and deal with our very loud dog).

Only con: The adhesive could be stronger. One of ours fell off after a week, but the other has held strong for months. Maybe try cleaning the glass with alcohol first?

Final verdict: For under $20, this is one of those rare products that actually delivers what it promises. Just...maybe keep the instructions handy during installation.