I was lucky, as this disposal replaced a failed 20 year old Kenmore, so my power and drain were already there to hook into. A major requirement for me was the power switch style sink plug. This is the only way to activate the disposal-- it is safer and simplifies the installation. 
We are amazed at how quick and quiet this machine is. 
The other easy part was the installation. There is no need for gluing ABS pipes and such. the INSinkErator comes with a rubber connector and large pinch clamp. They are smart enough that all the fittings are standard size. The instructions should be followed in order-- we made the mistake of forgetting to punch out the special cover for the dishwasher drain. So that added a few minutes to the install. Still, It only took me about 30 minutes to install. It will require a few simply tools and some plumbers putty for the sink drain.