It is the best software I have ever used for Fax service. It has all the functions one needs in order to serve customers well. Very fast and reliable! None whatsoever. They do their job well. It's just that it is not expensive as other competitors. If you want an excellent product with no flaws or disadvantages, then this is definitely the software for you. You can serve your customers well and make lots of money. This is especially true if you work in a group or office because everyone will use it and the software will save you time.