I used an established software package for invoices, billing, tracking costs, expenses, etc. for over 10 years. Then, they decided not to update their software for the Appple OS. What was worse, they wanted users to “rent” the software rather than own it. I was glad to read favorable reviews from Moon Invoice Pro. I do not have any regrets. It is much more flexible for my business needs and it is more “intuitive” than the application package of which I updated across 10 years. Stated differently, I am not paying for unnecessary features associated with a much larger company. I am quite pleased after a year of use that this application fits my small practice just fine. The office staff considers the software as an “intuitive” alternative to another vendor that is not as intuitive as one may suggest. My patients understand their invoices with all the necessary information, although Moon Invoice Pro allow me to add more “bells and whistles” if I desire.