OpenERP developers have a lot of advantages. One big advantage is that they are very affordable. You can get an OpenERP developer for as little as $ per hour, and you don't have to worry about the quality of their work. Another big advantage is that they are very flexible. You can hire them for as little or as much time as you need, and you can even change your mind about what you want them to do halfway through the project. Finally, OpenERP developers are very easy to work with. They are always willing to help out and answer any questions you may have.