Efax was getting too expensive so I looked into cheaper alternatives. Metrofax was the one we went with because of the low cost to set up (zero) and low monthly fees if we do not use it very much. It is also very useful for us to be able to schedule faxes for when we know businesses are going to be open, a feature that is not on all efaxing solutions. It was also simple to upload a csv file of contacts so we could make the switch from efax easily.