As a mom of two curious toddlers, I was desperate for a solution to keep my windows safe. The Kamtop 4 PCS Window Restrictor Locks seemed like the perfect fit - and after testing them for weeks, here's my brutally honest take.

The Good: These locks are STURDY. The zinc alloy construction feels premium, and the thick cable can withstand serious pulling (trust me, my kids tried). Installation took under 5 minutes per window with just a screwdriver. The 19cm opening is perfect - enough for fresh air but impossible for little bodies to squeeze through.

Real-Life Win: My 3-year-old used to climb furniture to reach window latches. Now he just presses his nose against the glass when it's locked - victory! The white finish blends nicely with our UPVC frames too.

The Not-So-Good: Like another reviewer, I got mismatched keys (2/4 locks came with wrong keys). Super frustrating! Also, these WON'T work with window screens - dealbreaker if you need screens like in Michigan.

Pro Tip: Install them at adult eye-level on BOTH sides of the window. This distributes pressure evenly when kids inevitably test their limits (ask me how I know).

Bottom line? If you need affordable childproofing fast and don't require screens, these deliver peace of mind. Just hope you get lucky with the keys!