I've had the Craftsman version for several years now. It's not a bad concept, but all of these variations could be put to better use if they would have a baseplate similar to a circular saw. Cutting with the thing is pretty much effortless, it feels like the blades are "melting" into the workpiece and there is no pull or push. The cuts, even in steel, are very smooth unlike those made by a bandsaw or cutoff machine. There are very little burrs to clean up if at all.
So the tool gives rather fantastic cuts, but they are limited in precision by how good I am at freehand cutting. Mostly I can make good cuts, but having either a baseplate to set for squareness or angle or some sort of chopsaw-like mechanism would make the tool a lot more useful and accurate for fabrication and not general rough cutting.
Rather than sending sparks around like a cutoff/abrasive wheeled cutter, these things toss rather healthy swarf that is also quite hot. You won't have a fire potential like you would with sparks, but don't let these land on exposed flesh, it does not feel good. Since the swarf is also rather sharp, you must use eye protection, and be careful during cleanup. The thing is also quite loud, especially if cutting sheet metal.
The Ridgid version has made the handling a little more sophisticated and sure by adding the top handle, but if you are used to using a cutoff wheel in a grinder, you've already mastered the technique. Like I said early on, adding some sort of base would make these things a great deal more useful and accurate.
