Electrician I've had it for over a year and it's one of my favorite tools. First of all, this is not a cord and plug hammer drill, do not expect comparable performance. However, it supports a variety of attachments. The drills break through concrete effortlessly every time. Crowns take longer but still work. It even powers the ground rods, but sometimes it takes a few hammer hits when they hit the rock and then it keeps moving. Everyone I've worked with didn't have it, they've had it ever since. It's much more portable, maneuverable, and convenient than its wired counterpart. Highly recommended, wasn't disappointed.