As a professional Welder/Fabricator I was hesitant, cause I go thru grinders. But, I'm more than glad I did. This thing rocks. Plenty of power, balanced, and best of all, the motor is protected from overheating. The first thing I tested it on was a piece of 3/8"x10" steel flat bar with a cut off wheel. It went thru it like nothing. It cut BETTER than a corded DeWalt. I got the -22 with 2- 5.0's. It used 1 battery to make the cut, which in my opinion is pretty good. It's perfect for that quick 30 second job...... it takes longer to get a cord out and plug it in then it does to do something quick. That's one of the main reasons I got it. Another main reason is cords. When I'm doing a job, there's cords and welding leads laying everywhere, or 1 cord and unplugging and plugging in tools. EVERYONE knows that's a pain. Milwaukee is EXPLODING with awesome cordless tools that I never imagined would be cordless. AND.....not only cordless, but cordless that lasts and is powerful. I made the switch to Milwaukee from the Yellow brand a few years ago. I'm eventually gonna get 2 more, then I'll have 1 for a cutoff wheel, 1 for a grinding wheel, and 1 for a sanding disc........ yeah, it's expensive, but saves in the long run switching wheels. Lazy.... No, just smart. It always boils down to time is money. The quicker you can get the job done, without tripping on cords all the time, the faster you get paid. Well.......most of the time, haha. Anyway, it's top notch and great quality in my book.