I use OOTI daily for all billing and accounting tracking of projects. It centralizes and allows everything to be grouped in one place, which keeps the files up to date without much effort. I like the ability to create links with other platforms and to globalize everything. The navigation is simple and intuitive, and it's very efficient. We have an internal cloud connected to OOTI, and during a global update, all the information automatically links, making it easier to track accounts in a project. I have always used OOTI in this company and it's really great. I found the initial setup very easy, I hardly had to do anything. I would give it a 10/10, it's the best.