Nothing, this is very good software. I have been using it for almost two years now and there are no problems that I know of yet. It is easy to use and has a lot of different options for you to use if need be. The only thing I don't like about azarbod is that sometimes it takes a little while to load up after you restart your computer so not sure why. If you want quality software to run your business then go with azarbod because they do what they say they will do. They can do anything from sales to accounting to inventory and more. We used to have another program we were using but we started doing everything in azarbod.