Installing a Trash Compactor? Good idea? Yes or no?

I have a family of 6 and we are constantly taking out the garbage and our garbage can is overfilled all of the time. I was thinking a trash compactor would be the answer to cut the trips out to the garbage can and to compact the garbage to keep the garbage from over filling. For you who have had and used a garbage disposal, have you found it to be a useful item? Thanks for your input!