Six years ago I had professionally installed this same garbage disposal under my kitchen sink. Worked without issue until a month ago. The units' grinding blades froze in place and water would not pass through, causing a backup in my sink and rendering my dishwasher unusable too. Tonight I purchased the same disposal. After thoroughly reading the instructions and with sage advice from the local Home Depot plumbing isle fellow, I embarked on the project. The advice to use my car tire jack to hold the unit up both ways (off and on) was priceless. Being reminded about the dishwasher knockout was appreciated. I am rather handy with a screwdriver and wrench and have successfully accomplished minor to medium repairs at my home. The hardest part was reconnecting the wires (you have to cut a little of the sheathing away from the wire to get to the copper for good contact), but with the circuit breaker off (A MUST) it was about as hard as replacing a light switch. The new unit fit into the sink collar of my old unit so not having to replace that was a big plus. All in all, with the time to redo the wiring, it took me about two hours start to finish (clean out under the sink, kill the circuit breaker, read the instructions, dismount the first, wire the second, mount the second, test runs, additional tightening of screws and clean up). I'm pleased its in, and operational, and didnt require a call to a plumber. A real plus in my book! If you have an exisiting Badger or insinkerator and basic knowledge of how things work, I would recommend this for easy installation.