We had no clue as to how many pages we went through a month, and were surprised that we hit the 6000 mark the 1st month, but at $10/500, it is STILL a GREAT deal. No more paper, no more toner, no more wear/tear on printer/fax.
This was the reason I opted for a fax board (same benefits, but onsite). We get maybe a couple thousand more than that. I think JBS mentioned you can keep your existing fax line have the faxes uploaded into the Updox interface. That way you don't have to buy the bundles. I'm sure you would agree when you're saving close to $90 a month.