I use this tool for glass cutting. I am a novice, so I like the fact that this tool makes it extremely easy to break the glass along the score line without having to use my hands or tap it with a conventional glass cutter handle. I ground the "anvil" down to get a sharper point. (Please see photo.) - ALWAYS WEAR SAFETY GLASSES WHEN CUTTING GLASS!
Don't trust reviews! This worked better than anything else!
So after reading all the reviews about this tool breaking, I went and purchased a tile nipper for $20, a glass nipper (the one with two rollers) for $13, and a stone sanding block for $8. I began my project of installing glass mosaic tile. Both tools made the glass chip so bad, I had to buff them out and still wasn't perfect. It was time consuming and made a mess. Halfway through, I decided to go back to home depot and get this tool. OMG it's amazing!!!! As long as you score each piece in a straight line with pressure, you'll get near perfect cuts. The tool is cheap so if you're worried about it breaking (which it did not for me), buy two. Here is a photo of what took me literally 1 minute to cut 6 pieces. A MUST FOR MOSAIC GLASS TILES.