They're usually pretty simple to connect. Just make sure you understand the number of connections that you have (sink, dishwasher, etc.). If you have a septic system, consider a disposal optimized for a septic system and a drain basket. What little gets by the drain basket gets pulverized in the disposal before it gets to the septic tank.
Originally Posted By: scurvy
That being said, I really dislike garbage disposals. All they've ever done for me is eat shot glasses or quit working and stink. Mostly the latter, the former was a unit I replaced and it merrily crunched up our barware for years.
If you're constantly sticking your "barware" in the disposal rather than the dishwasher, you should probably stop drinking.