Works as described
I've used this on both mineral glass and sapphire, and it unquestionably works, with a little modification.  Forget the little sticks and rubbing the glass endlessly.  Use a dremmel or other rotary tool with a polishing disc on a low setting.  Shallow surface scratches will come out in about 3-5 minutes.  Deeper, more complex scratches and abrasions will take longer, and, there are just some scratches that are simply to deep and too wide to polish out.  There is enough product to polish 4-6 watch crystals with light to moderate scratches.
Rating: 5 stars