Having never used an angle grinder and having nothing quite like it, this grinder gets top marks in every respect. It wasn't too loud and the engine sounds smooth. It doesn't have variable speed, but it doesn't need it. I managed to cut 2 box springs and old box springs. It got the job done and I have no doubt that it can cut any metal I need as long as I don't try to push it too hard and let the wheel do its job (but that can be said of any power tool. What what i like about this tool compared to others in the same class and price range is that it is heavier than many and indicates quality metal parts one must get! just make sure you have extra cutting wheels i had to find out that once the wheels get too short the vibration level increases exponentially so buy one, get extra cutting wheels and get to work!