Let me start by saying this bracket saved my NYC summer. My 8,000 BTU AC now sits securely in my pre-war apartment window, but getting there? That was a journey.

The good: This thing is SOLID. Once installed, it holds my heavy AC unit like it's nothing. The adjustable arms (4.5"-6.6") accommodated my weird window dimensions perfectly. The built-in bubble level is genius - no more guessing if your AC is tilted correctly for drainage.

Installation reality check: You'll need basic tools and patience. The instructions aren't terrible, but I spent 45 minutes figuring out the right bolt configuration (protip: dry fit everything first). Like another reviewer, I ended up modifying a 2x2 wood piece for extra support on my deep windowsill.

Watch out for: Metal burs! I got a nasty surprise from a sharp edge during assembly - keep a file handy. Also, if your window has unusual proportions (like elevated sills), this might not work without modifications.

Final verdict? For $30, it beats custom brackets costing 6x more. Just be ready to put in some elbow grease during setup. Once installed, it's rock-solid - my AC hasn't budged through multiple thunderstorms.