I bought this a few months ago. I never really thought it would (or could) work!! We restore old homes and do most of the work ourselves. And I HATE drywall! Really!! Cutting those 4x8 (or worse 4x12) sheets are no fun. We just finished the latest project and this tool is absolutely INCREDIBLE. While I bought extra blades (wheels) for it, I am still on the original blade after hanging over 75 sheets of drywall. This tool is now one of my favorites. I am NOT a professional drywall hanger. But I am fairly good at it. So if you are a do-it-your-selfer ... this is a must have tool. Cutting drywall is a snap. Wish I could give it 6-stars ...
I've heard people say it's not necessary, or really no better or faster than a utility knife. That may be true if you're a professional drywaller and do it everyday. But I bought this tool because I was refinishing the basement in my 1974 house. Due to settling a lot of trimming is needed. I find this tool to be infinitely better than using a utility knife and so much faster. I still use a knife if I just need to trim a little off the end but for making actual cuts in drywall I love this thing. I almost didn't buy this tool because I thought it might be just a gimmick. Not so, it works as advertised. The ONLY issue I've had is when you are first beginning or finishing the cut it can be hard to keep the line straight. But this is only because you can't see where the cut is going yet because it hasn't started and has nothing to do with the tool itself.
This thing is simply amazing. If you have ever scored drywall with a knife, snapped it and then cut the paper on the other side, you know how tedious this gets. Once you use this tool, you'll never go back. You can almost run through an entire house on one blade. Replacement blades are available and are well worth it. This tool uses some *really* strong magnets, so you can get pinched if you are not careful. Some folks, after using this tool, would not hesitate to drop their hard earned cash for it -- even if they are only doing a single room."
The easiest way to cut 1/2" and 5/8" drywall, bar none! I use it all the time during my home improvement project. The only limitations that I can see is that it doesn't cut small, narrow pieces of drywall very well. You can score them with this device, but then you have to go over them with a utility knife.