maxEmail.com looks OK after a couple days usage. My small business uses call forwarding to forward our fax line permanently to an online service. Since we often do not need to print incoming faxes, the cost of the online fax service is less than the cost of buying new ink jet cartridges every few weeks.
We were using MyFax.com but didn't care much for the user interface, and figured the voicemail that comes with maxEmail.com might be handy to have. When maxEmail.com suspects a fax is junk, it sends an email message with a link the user can click on to either download the fax or confirm the fax should be processed normally.
Online fax services are handy to have sometimes. If you don't mind the fax header, and you need to scan a document, it's almost easier to fax it to yourself than it is to fiddle around with the scanner software on the PC.