The best thing about hylafax is its flexibility in terms of network connectivity (both internal LAN/WAN).
It also has an easy interface which makes it very user friendly even if you have never used any other software before or not at all! I would say HyLAFAX does exactly what we expected from them - reliable solution with good customer support team available 24x7 via live chat & email as well. There's nothing much negative points regarding this product but maybe there should be some more options like integration into mobile apps etc so everyone can use their phone instead of using desktop computers only when sending documents internally through emails / attachments? We were solving our document management problems since years now without having proper archiving system till then.