This service meets all my requirements - low price, quick, reliable, good customer service. Moreover, it works via mobile, so i can fax anywhere, anytime. I use faxes.co.uk for several years and I have no adverse comment.
I use Popfax for many years and i can highly recommend him to all. Low rates, easy to use, great customer service if necessary, promotions, news... A very useful feature for me is a fax mobile because now i can fax anywhere, anytime.