It does work, but yields varied results. A lot of the time the edge is too jagged to attempt to fix. It works best if you have a glass cutter and can place an initial gouge where you want the lip of the glass to be. (Since glass is crystalline, the cut line will propagate into the material with the temperature change. Still, unlikely to be perfect.)
Give me a woman who loves beer and I will conquer the world. (I think I may have found her!)
On deck: Citra smash
bottled: Porter, lots of cider, IPA, honey ale, and esb.
Secondary: Zip point squat
Kegged: Amber Ale