What do you like best?
I don't own a fax machine, and am not always near a FedEx Office to use theirs. Having HelloFax at my fingertips to send press releases and documents without needing to print out such things first is a godsend. Their plan pricing is reasonable, as well, especially for what you receive in return.
What do you dislike?
My only quibble with HelloFax is how small the free plan is. Only five pages for free total, then 99 cents per page after? I'd rather have a monthly quota with more free pages than upgrade, as I don't fax documents to clients and businesses often enough to justify a paid plan.
Recommendations to others considering the product
If you need to fax anything, and don't wish to invest in a proper fax machine -- because you actually prefer living in the present -- HelloFax is the way to go. I would recommend upgrading to the lowest cost solution appropriate for your business, as five free pages total isn't enough for anyone's needs.
What business problems are you solving with the product? What benefits have you realized?
Some businesses and publications are only reachable by fax, sadly. HelloFax has helped me cross this particular technological canyon, where upon I can rain printed paper to the intended recepients from the cloud.