Product review (4 stars): Power at your finger tips
I purchased this item last week and installed it over the weekend.  It was easy to install and all the parts come with it so you don't have to worry about getting the collar or the rubber drain thing.  Just make sure the latch the collar down.  This disposal is pretty powerful and even thought it has sound deading it vibrates the sink area.  I used to have a 1/2 horse power one and this is so much better at 3/4.  You just have to remove the rubber drain and pull anything out that you have dropped in.  I am a single guy and I think that this would be good for a family.