Very easy to use, it works flawlessly with our system, very friendly support team as well! None at all! Sometimes there are some glitches but they resolve them quickly. The price of this product is pretty high compared to other products in its category. I would recommend if you're looking for something reliable that can handle your business needs without any problems then definitely go with FaxPlus. We've been using this software since last 10 years and never faced any issues or complaints. So far everything has been perfect.