Summary: You will not be disappointed with this tool. It is great for coring holes for plumbing, electrical and gas. It is great for concrete demo. I use it to break up concrete floors to install plumbing. You won't go wrong buying this tool. Don't waste your money on those smaller tools that will take twice as long to get the job done.
Summary: The very first thing i noticed about this particular model was its weight. To a guy like me heavy means well built, and this thing is one heavy mother. It's great because it has enough power to jack hammer the hell out of anything, and with the turn of a knob, you can drill a 6" hole through 3 feet of granite. This is the greatest most magnificent power tool i have ever owned, and i own many. I've been a plumber for many years and I swear by Milwaukee tools.
Summary: I had initially passed this by and thought a smaller hammer drill would meet my needs. Turns out, if you want to go through fieldstone and granite and other really hard stuff, and if you want to drill deeply into said materials, you need this. For my particular project, I needed to drill through a number of rocks of different sizes and composition ~ about 15' if it was all stacked up.